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Finding the Fourth Proportional to 20,572.66, 28,390.21 and 11,141.22

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Solution

The fourth proportional to 20,572.66, 28,390.21 and 11,141.22 is: 15,374.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.66 : 28,390.21 = 11,141.22 : x
  2. Step 2: Convert to fraction form
    20,572.66/28,390.21 = 11,141.22/x
  3. Step 3: Cross multiply
    20,572.66x = 28,390.21 × 11,141.22
  4. Step 4: Simplify right side
    20,572.66x = 316,301,575.46
  5. Step 5: Solve for x
    x = 316,301,575.46/20,572.66
  6. Step 6: Final answer
    x = 15,374.85

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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.