Home / 20,521.57-28,319.76-11,090.13

Finding the Fourth Proportional to 20,521.57, 28,319.76 and 11,090.13

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Solution

The fourth proportional to 20,521.57, 28,319.76 and 11,090.13 is: 15,304.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.57 : 28,319.76 = 11,090.13 : x
  2. Step 2: Convert to fraction form
    20,521.57/28,319.76 = 11,090.13/x
  3. Step 3: Cross multiply
    20,521.57x = 28,319.76 × 11,090.13
  4. Step 4: Simplify right side
    20,521.57x = 314,069,819.97
  5. Step 5: Solve for x
    x = 314,069,819.97/20,521.57
  6. Step 6: Final answer
    x = 15,304.38

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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.