Home / 20,915.04-31,330-9,806.16

Finding the Fourth Proportional to 20,915.04, 31,330 and 9,806.16

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Solution

The fourth proportional to 20,915.04, 31,330 and 9,806.16 is: 14,689.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.04 : 31,330 = 9,806.16 : x
  2. Step 2: Convert to fraction form
    20,915.04/31,330 = 9,806.16/x
  3. Step 3: Cross multiply
    20,915.04x = 31,330 × 9,806.16
  4. Step 4: Simplify right side
    20,915.04x = 307,226,992.80
  5. Step 5: Solve for x
    x = 307,226,992.80/20,915.04
  6. Step 6: Final answer
    x = 14,689.29

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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.