Home / 20,878.60-31,253.10-18,545.80

Finding the Fourth Proportional to 20,878.60, 31,253.10 and 18,545.80

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Solution

The fourth proportional to 20,878.60, 31,253.10 and 18,545.80 is: 27,761.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.60 : 31,253.10 = 18,545.80 : x
  2. Step 2: Convert to fraction form
    20,878.60/31,253.10 = 18,545.80/x
  3. Step 3: Cross multiply
    20,878.60x = 31,253.10 × 18,545.80
  4. Step 4: Simplify right side
    20,878.60x = 579,613,741.98
  5. Step 5: Solve for x
    x = 579,613,741.98/20,878.60
  6. Step 6: Final answer
    x = 27,761.14

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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.