Home / 28,545.12-39,379.12-18,476.80

Finding the Fourth Proportional to 28,545.12, 39,379.12 and 18,476.80

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Solution

The fourth proportional to 28,545.12, 39,379.12 and 18,476.80 is: 25,489.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.12 : 39,379.12 = 18,476.80 : x
  2. Step 2: Convert to fraction form
    28,545.12/39,379.12 = 18,476.80/x
  3. Step 3: Cross multiply
    28,545.12x = 39,379.12 × 18,476.80
  4. Step 4: Simplify right side
    28,545.12x = 727,600,124.42
  5. Step 5: Solve for x
    x = 727,600,124.42/28,545.12
  6. Step 6: Final answer
    x = 25,489.48

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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.