Home / 20,863.30-31,108.85-18,545.08

Finding the Fourth Proportional to 20,863.30, 31,108.85 and 18,545.08

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Solution

The fourth proportional to 20,863.30, 31,108.85 and 18,545.08 is: 27,652.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.30 : 31,108.85 = 18,545.08 : x
  2. Step 2: Convert to fraction form
    20,863.30/31,108.85 = 18,545.08/x
  3. Step 3: Cross multiply
    20,863.30x = 31,108.85 × 18,545.08
  4. Step 4: Simplify right side
    20,863.30x = 576,916,111.96
  5. Step 5: Solve for x
    x = 576,916,111.96/20,863.30
  6. Step 6: Final answer
    x = 27,652.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.