Home / 20,489.00-28,272.31-11,875.13

Finding the Fourth Proportional to 20,489.00, 28,272.31 and 11,875.13

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Solution

The fourth proportional to 20,489.00, 28,272.31 and 11,875.13 is: 16,386.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.00 : 28,272.31 = 11,875.13 : x
  2. Step 2: Convert to fraction form
    20,489.00/28,272.31 = 11,875.13/x
  3. Step 3: Cross multiply
    20,489.00x = 28,272.31 × 11,875.13
  4. Step 4: Simplify right side
    20,489.00x = 335,737,291.62
  5. Step 5: Solve for x
    x = 335,737,291.62/20,489.00
  6. Step 6: Final answer
    x = 16,386.23

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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.