Home / 12,286,280.80-18,429,421.20-8,459,905.60

Finding the Fourth Proportional to 12,286,280.80, 18,429,421.20 and 8,459,905.60

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Solution

The fourth proportional to 12,286,280.80, 18,429,421.20 and 8,459,905.60 is: 12,689,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,286,280.80 : 18,429,421.20 = 8,459,905.60 : x
  2. Step 2: Convert to fraction form
    12,286,280.80/18,429,421.20 = 8,459,905.60/x
  3. Step 3: Cross multiply
    12,286,280.80x = 18,429,421.20 × 8,459,905.60
  4. Step 4: Simplify right side
    12,286,280.80x = 155,911,163,614,638.72
  5. Step 5: Solve for x
    x = 155,911,163,614,638.72/12,286,280.80
  6. Step 6: Final answer
    x = 12,689,858.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.