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Finding the Fourth Proportional to 21,593.52, 29,799.12 and 12,520.64

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Solution

The fourth proportional to 21,593.52, 29,799.12 and 12,520.64 is: 17,278.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,593.52 : 29,799.12 = 12,520.64 : x
  2. Step 2: Convert to fraction form
    21,593.52/29,799.12 = 12,520.64/x
  3. Step 3: Cross multiply
    21,593.52x = 29,799.12 × 12,520.64
  4. Step 4: Simplify right side
    21,593.52x = 373,104,053.84
  5. Step 5: Solve for x
    x = 373,104,053.84/21,593.52
  6. Step 6: Final answer
    x = 17,278.52

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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.