Home / 22,545.45-31,115.07-12,985.68

Finding the Fourth Proportional to 22,545.45, 31,115.07 and 12,985.68

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Solution

The fourth proportional to 22,545.45, 31,115.07 and 12,985.68 is: 17,921.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,545.45 : 31,115.07 = 12,985.68 : x
  2. Step 2: Convert to fraction form
    22,545.45/31,115.07 = 12,985.68/x
  3. Step 3: Cross multiply
    22,545.45x = 31,115.07 × 12,985.68
  4. Step 4: Simplify right side
    22,545.45x = 404,050,342.20
  5. Step 5: Solve for x
    x = 404,050,342.20/22,545.45
  6. Step 6: Final answer
    x = 17,921.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.