Home / 20,387.32-30,537.78-15,402.04

Finding the Fourth Proportional to 20,387.32, 30,537.78 and 15,402.04

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Solution

The fourth proportional to 20,387.32, 30,537.78 and 15,402.04 is: 23,070.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.32 : 30,537.78 = 15,402.04 : x
  2. Step 2: Convert to fraction form
    20,387.32/30,537.78 = 15,402.04/x
  3. Step 3: Cross multiply
    20,387.32x = 30,537.78 × 15,402.04
  4. Step 4: Simplify right side
    20,387.32x = 470,344,109.07
  5. Step 5: Solve for x
    x = 470,344,109.07/20,387.32
  6. Step 6: Final answer
    x = 23,070.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.