Home / 20,712.89-28,549.64-14,655.31

Finding the Fourth Proportional to 20,712.89, 28,549.64 and 14,655.31

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Solution

The fourth proportional to 20,712.89, 28,549.64 and 14,655.31 is: 20,200.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.89 : 28,549.64 = 14,655.31 : x
  2. Step 2: Convert to fraction form
    20,712.89/28,549.64 = 14,655.31/x
  3. Step 3: Cross multiply
    20,712.89x = 28,549.64 × 14,655.31
  4. Step 4: Simplify right side
    20,712.89x = 418,403,789.85
  5. Step 5: Solve for x
    x = 418,403,789.85/20,712.89
  6. Step 6: Final answer
    x = 20,200.16

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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.