Home / 20,980.62-31,478.22-9,302.04

Finding the Fourth Proportional to 20,980.62, 31,478.22 and 9,302.04

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Solution

The fourth proportional to 20,980.62, 31,478.22 and 9,302.04 is: 13,956.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.62 : 31,478.22 = 9,302.04 : x
  2. Step 2: Convert to fraction form
    20,980.62/31,478.22 = 9,302.04/x
  3. Step 3: Cross multiply
    20,980.62x = 31,478.22 × 9,302.04
  4. Step 4: Simplify right side
    20,980.62x = 292,811,661.57
  5. Step 5: Solve for x
    x = 292,811,661.57/20,980.62
  6. Step 6: Final answer
    x = 13,956.29

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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.