Home / 11,423.20-17,145.60-9,781.60

Finding the Fourth Proportional to 11,423.20, 17,145.60 and 9,781.60

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Solution

The fourth proportional to 11,423.20, 17,145.60 and 9,781.60 is: 14,681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,423.20 : 17,145.60 = 9,781.60 : x
  2. Step 2: Convert to fraction form
    11,423.20/17,145.60 = 9,781.60/x
  3. Step 3: Cross multiply
    11,423.20x = 17,145.60 × 9,781.60
  4. Step 4: Simplify right side
    11,423.20x = 167,711,400.96
  5. Step 5: Solve for x
    x = 167,711,400.96/11,423.20
  6. Step 6: Final answer
    x = 14,681.65

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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.