Home / 42,380.12-63,545.46-12,789.08

Finding the Fourth Proportional to 42,380.12, 63,545.46 and 12,789.08

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Solution

The fourth proportional to 42,380.12, 63,545.46 and 12,789.08 is: 19,176.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,380.12 : 63,545.46 = 12,789.08 : x
  2. Step 2: Convert to fraction form
    42,380.12/63,545.46 = 12,789.08/x
  3. Step 3: Cross multiply
    42,380.12x = 63,545.46 × 12,789.08
  4. Step 4: Simplify right side
    42,380.12x = 812,687,971.58
  5. Step 5: Solve for x
    x = 812,687,971.58/42,380.12
  6. Step 6: Final answer
    x = 19,176.16

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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.