Home / 20,520.57-28,318.38-11,089.13

Finding the Fourth Proportional to 20,520.57, 28,318.38 and 11,089.13

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Solution

The fourth proportional to 20,520.57, 28,318.38 and 11,089.13 is: 15,302.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.57 : 28,318.38 = 11,089.13 : x
  2. Step 2: Convert to fraction form
    20,520.57/28,318.38 = 11,089.13/x
  3. Step 3: Cross multiply
    20,520.57x = 28,318.38 × 11,089.13
  4. Step 4: Simplify right side
    20,520.57x = 314,026,055.62
  5. Step 5: Solve for x
    x = 314,026,055.62/20,520.57
  6. Step 6: Final answer
    x = 15,302.99

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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.