Home / 21,126.47-31,687.25-5,545.31

Finding the Fourth Proportional to 21,126.47, 31,687.25 and 5,545.31

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Solution

The fourth proportional to 21,126.47, 31,687.25 and 5,545.31 is: 8,317.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.47 : 31,687.25 = 5,545.31 : x
  2. Step 2: Convert to fraction form
    21,126.47/31,687.25 = 5,545.31/x
  3. Step 3: Cross multiply
    21,126.47x = 31,687.25 × 5,545.31
  4. Step 4: Simplify right side
    21,126.47x = 175,715,438.13
  5. Step 5: Solve for x
    x = 175,715,438.13/21,126.47
  6. Step 6: Final answer
    x = 8,317.31

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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.