Home / 19,689.12-29,545.20-7,385.76

Finding the Fourth Proportional to 19,689.12, 29,545.20 and 7,385.76

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Solution

The fourth proportional to 19,689.12, 29,545.20 and 7,385.76 is: 11,082.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,689.12 : 29,545.20 = 7,385.76 : x
  2. Step 2: Convert to fraction form
    19,689.12/29,545.20 = 7,385.76/x
  3. Step 3: Cross multiply
    19,689.12x = 29,545.20 × 7,385.76
  4. Step 4: Simplify right side
    19,689.12x = 218,213,756.35
  5. Step 5: Solve for x
    x = 218,213,756.35/19,689.12
  6. Step 6: Final answer
    x = 11,082.96

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1.5x scale

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.