Home / 20,642.18-28,490.74-13,569.26

Finding the Fourth Proportional to 20,642.18, 28,490.74 and 13,569.26

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Solution

The fourth proportional to 20,642.18, 28,490.74 and 13,569.26 is: 18,728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.18 : 28,490.74 = 13,569.26 : x
  2. Step 2: Convert to fraction form
    20,642.18/28,490.74 = 13,569.26/x
  3. Step 3: Cross multiply
    20,642.18x = 28,490.74 × 13,569.26
  4. Step 4: Simplify right side
    20,642.18x = 386,598,082.28
  5. Step 5: Solve for x
    x = 386,598,082.28/20,642.18
  6. Step 6: Final answer
    x = 18,728.55

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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.