Home / 12,281.20-18,421.88-4,486.80

Finding the Fourth Proportional to 12,281.20, 18,421.88 and 4,486.80

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Solution

The fourth proportional to 12,281.20, 18,421.88 and 4,486.80 is: 6,730.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.20 : 18,421.88 = 4,486.80 : x
  2. Step 2: Convert to fraction form
    12,281.20/18,421.88 = 4,486.80/x
  3. Step 3: Cross multiply
    12,281.20x = 18,421.88 × 4,486.80
  4. Step 4: Simplify right side
    12,281.20x = 82,655,291.18
  5. Step 5: Solve for x
    x = 82,655,291.18/12,281.20
  6. Step 6: Final answer
    x = 6,730.23

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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.