Home / 20,716.16-28,569.92-13,550.10

Finding the Fourth Proportional to 20,716.16, 28,569.92 and 13,550.10

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Solution

The fourth proportional to 20,716.16, 28,569.92 and 13,550.10 is: 18,687.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.16 : 28,569.92 = 13,550.10 : x
  2. Step 2: Convert to fraction form
    20,716.16/28,569.92 = 13,550.10/x
  3. Step 3: Cross multiply
    20,716.16x = 28,569.92 × 13,550.10
  4. Step 4: Simplify right side
    20,716.16x = 387,125,272.99
  5. Step 5: Solve for x
    x = 387,125,272.99/20,716.16
  6. Step 6: Final answer
    x = 18,687.12

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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.