Home / 11,545.60-17,318.40-8,780.80

Finding the Fourth Proportional to 11,545.60, 17,318.40 and 8,780.80

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Solution

The fourth proportional to 11,545.60, 17,318.40 and 8,780.80 is: 13,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,545.60 : 17,318.40 = 8,780.80 : x
  2. Step 2: Convert to fraction form
    11,545.60/17,318.40 = 8,780.80/x
  3. Step 3: Cross multiply
    11,545.60x = 17,318.40 × 8,780.80
  4. Step 4: Simplify right side
    11,545.60x = 152,069,406.72
  5. Step 5: Solve for x
    x = 152,069,406.72/11,545.60
  6. Step 6: Final answer
    x = 13,171.20

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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.