Home / 21,655.68-29,876.54-13,154.78

Finding the Fourth Proportional to 21,655.68, 29,876.54 and 13,154.78

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Solution

The fourth proportional to 21,655.68, 29,876.54 and 13,154.78 is: 18,148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.68 : 29,876.54 = 13,154.78 : x
  2. Step 2: Convert to fraction form
    21,655.68/29,876.54 = 13,154.78/x
  3. Step 3: Cross multiply
    21,655.68x = 29,876.54 × 13,154.78
  4. Step 4: Simplify right side
    21,655.68x = 393,019,310.86
  5. Step 5: Solve for x
    x = 393,019,310.86/21,655.68
  6. Step 6: Final answer
    x = 18,148.56

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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.