Home / 20,734.68-28,599.32-12,781.28

Finding the Fourth Proportional to 20,734.68, 28,599.32 and 12,781.28

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Solution

The fourth proportional to 20,734.68, 28,599.32 and 12,781.28 is: 17,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734.68 : 28,599.32 = 12,781.28 : x
  2. Step 2: Convert to fraction form
    20,734.68/28,599.32 = 12,781.28/x
  3. Step 3: Cross multiply
    20,734.68x = 28,599.32 × 12,781.28
  4. Step 4: Simplify right side
    20,734.68x = 365,535,916.73
  5. Step 5: Solve for x
    x = 365,535,916.73/20,734.68
  6. Step 6: Final answer
    x = 17,629.20

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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.