Home / 10,864.20-16,280.10-9,211.80

Finding the Fourth Proportional to 10,864.20, 16,280.10 and 9,211.80

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Solution

The fourth proportional to 10,864.20, 16,280.10 and 9,211.80 is: 13,803.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,864.20 : 16,280.10 = 9,211.80 : x
  2. Step 2: Convert to fraction form
    10,864.20/16,280.10 = 9,211.80/x
  3. Step 3: Cross multiply
    10,864.20x = 16,280.10 × 9,211.80
  4. Step 4: Simplify right side
    10,864.20x = 149,969,025.18
  5. Step 5: Solve for x
    x = 149,969,025.18/10,864.20
  6. Step 6: Final answer
    x = 13,803.96

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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.