Home / 20,730.64-28,609-14,691.68

Finding the Fourth Proportional to 20,730.64, 28,609 and 14,691.68

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Solution

The fourth proportional to 20,730.64, 28,609 and 14,691.68 is: 20,275.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.64 : 28,609 = 14,691.68 : x
  2. Step 2: Convert to fraction form
    20,730.64/28,609 = 14,691.68/x
  3. Step 3: Cross multiply
    20,730.64x = 28,609 × 14,691.68
  4. Step 4: Simplify right side
    20,730.64x = 420,314,273.12
  5. Step 5: Solve for x
    x = 420,314,273.12/20,730.64
  6. Step 6: Final answer
    x = 20,275.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.