Home / 15,545.34-21,459.77-9,169.78

Finding the Fourth Proportional to 15,545.34, 21,459.77 and 9,169.78

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Solution

The fourth proportional to 15,545.34, 21,459.77 and 9,169.78 is: 12,658.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,545.34 : 21,459.77 = 9,169.78 : x
  2. Step 2: Convert to fraction form
    15,545.34/21,459.77 = 9,169.78/x
  3. Step 3: Cross multiply
    15,545.34x = 21,459.77 × 9,169.78
  4. Step 4: Simplify right side
    15,545.34x = 196,781,369.75
  5. Step 5: Solve for x
    x = 196,781,369.75/15,545.34
  6. Step 6: Final answer
    x = 12,658.54

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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.