Home / 20,572.70-28,390.84-12,619.31

Finding the Fourth Proportional to 20,572.70, 28,390.84 and 12,619.31

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Solution

The fourth proportional to 20,572.70, 28,390.84 and 12,619.31 is: 17,414.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.70 : 28,390.84 = 12,619.31 : x
  2. Step 2: Convert to fraction form
    20,572.70/28,390.84 = 12,619.31/x
  3. Step 3: Cross multiply
    20,572.70x = 28,390.84 × 12,619.31
  4. Step 4: Simplify right side
    20,572.70x = 358,272,637.62
  5. Step 5: Solve for x
    x = 358,272,637.62/20,572.70
  6. Step 6: Final answer
    x = 17,414.96

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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.