Home / 21,126.20-31,686.90-5,545.04

Finding the Fourth Proportional to 21,126.20, 31,686.90 and 5,545.04

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Solution

The fourth proportional to 21,126.20, 31,686.90 and 5,545.04 is: 8,316.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.20 : 31,686.90 = 5,545.04 : x
  2. Step 2: Convert to fraction form
    21,126.20/31,686.90 = 5,545.04/x
  3. Step 3: Cross multiply
    21,126.20x = 31,686.90 × 5,545.04
  4. Step 4: Simplify right side
    21,126.20x = 175,705,127.98
  5. Step 5: Solve for x
    x = 175,705,127.98/21,126.20
  6. Step 6: Final answer
    x = 8,316.93

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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.