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Finding the Fourth Proportional to 15,593.64, 21,519.20 and 8,520.16

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Solution

The fourth proportional to 15,593.64, 21,519.20 and 8,520.16 is: 11,757.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,593.64 : 21,519.20 = 8,520.16 : x
  2. Step 2: Convert to fraction form
    15,593.64/21,519.20 = 8,520.16/x
  3. Step 3: Cross multiply
    15,593.64x = 21,519.20 × 8,520.16
  4. Step 4: Simplify right side
    15,593.64x = 183,347,027.07
  5. Step 5: Solve for x
    x = 183,347,027.07/15,593.64
  6. Step 6: Final answer
    x = 11,757.81

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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.