Home / 21,517.56-29,690.28-13,569.84

Finding the Fourth Proportional to 21,517.56, 29,690.28 and 13,569.84

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Solution

The fourth proportional to 21,517.56, 29,690.28 and 13,569.84 is: 18,723.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,517.56 : 29,690.28 = 13,569.84 : x
  2. Step 2: Convert to fraction form
    21,517.56/29,690.28 = 13,569.84/x
  3. Step 3: Cross multiply
    21,517.56x = 29,690.28 × 13,569.84
  4. Step 4: Simplify right side
    21,517.56x = 402,892,349.16
  5. Step 5: Solve for x
    x = 402,892,349.16/21,517.56
  6. Step 6: Final answer
    x = 18,723.89

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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.