Home / 20,398.64-28,140.60-12,841.52

Finding the Fourth Proportional to 20,398.64, 28,140.60 and 12,841.52

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Solution

The fourth proportional to 20,398.64, 28,140.60 and 12,841.52 is: 17,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.64 : 28,140.60 = 12,841.52 : x
  2. Step 2: Convert to fraction form
    20,398.64/28,140.60 = 12,841.52/x
  3. Step 3: Cross multiply
    20,398.64x = 28,140.60 × 12,841.52
  4. Step 4: Simplify right side
    20,398.64x = 361,368,077.71
  5. Step 5: Solve for x
    x = 361,368,077.71/20,398.64
  6. Step 6: Final answer
    x = 17,715.30

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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.