Home / 10,207.20-15,310.80-8,911.20

Finding the Fourth Proportional to 10,207.20, 15,310.80 and 8,911.20

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Solution

The fourth proportional to 10,207.20, 15,310.80 and 8,911.20 is: 13,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,207.20 : 15,310.80 = 8,911.20 : x
  2. Step 2: Convert to fraction form
    10,207.20/15,310.80 = 8,911.20/x
  3. Step 3: Cross multiply
    10,207.20x = 15,310.80 × 8,911.20
  4. Step 4: Simplify right side
    10,207.20x = 136,437,600.96
  5. Step 5: Solve for x
    x = 136,437,600.96/10,207.20
  6. Step 6: Final answer
    x = 13,366.80

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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.