Home / 20,385.93-28,132.25-11,892.99

Finding the Fourth Proportional to 20,385.93, 28,132.25 and 11,892.99

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Solution

The fourth proportional to 20,385.93, 28,132.25 and 11,892.99 is: 16,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.93 : 28,132.25 = 11,892.99 : x
  2. Step 2: Convert to fraction form
    20,385.93/28,132.25 = 11,892.99/x
  3. Step 3: Cross multiply
    20,385.93x = 28,132.25 × 11,892.99
  4. Step 4: Simplify right side
    20,385.93x = 334,576,508.46
  5. Step 5: Solve for x
    x = 334,576,508.46/20,385.93
  6. Step 6: Final answer
    x = 16,412.13

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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.