Home / 12,810.80-19,216.20-9,311.60

Finding the Fourth Proportional to 12,810.80, 19,216.20 and 9,311.60

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Solution

The fourth proportional to 12,810.80, 19,216.20 and 9,311.60 is: 13,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810.80 : 19,216.20 = 9,311.60 : x
  2. Step 2: Convert to fraction form
    12,810.80/19,216.20 = 9,311.60/x
  3. Step 3: Cross multiply
    12,810.80x = 19,216.20 × 9,311.60
  4. Step 4: Simplify right side
    12,810.80x = 178,933,567.92
  5. Step 5: Solve for x
    x = 178,933,567.92/12,810.80
  6. Step 6: Final answer
    x = 13,967.40

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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.