Home / 20,379.32-28,125.81-13,572.97

Finding the Fourth Proportional to 20,379.32, 28,125.81 and 13,572.97

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Solution

The fourth proportional to 20,379.32, 28,125.81 and 13,572.97 is: 18,732.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.32 : 28,125.81 = 13,572.97 : x
  2. Step 2: Convert to fraction form
    20,379.32/28,125.81 = 13,572.97/x
  3. Step 3: Cross multiply
    20,379.32x = 28,125.81 × 13,572.97
  4. Step 4: Simplify right side
    20,379.32x = 381,750,666.87
  5. Step 5: Solve for x
    x = 381,750,666.87/20,379.32
  6. Step 6: Final answer
    x = 18,732.26

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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.