Home / 13,609.93-18,781.68-7,641.55

Finding the Fourth Proportional to 13,609.93, 18,781.68 and 7,641.55

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Solution

The fourth proportional to 13,609.93, 18,781.68 and 7,641.55 is: 10,545.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.93 : 18,781.68 = 7,641.55 : x
  2. Step 2: Convert to fraction form
    13,609.93/18,781.68 = 7,641.55/x
  3. Step 3: Cross multiply
    13,609.93x = 18,781.68 × 7,641.55
  4. Step 4: Simplify right side
    13,609.93x = 143,521,146.80
  5. Step 5: Solve for x
    x = 143,521,146.80/13,609.93
  6. Step 6: Final answer
    x = 10,545.33

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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.