Home / 10,921.04-16,366.92-10,221.20

Finding the Fourth Proportional to 10,921.04, 16,366.92 and 10,221.20

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Solution

The fourth proportional to 10,921.04, 16,366.92 and 10,221.20 is: 15,318.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.04 : 16,366.92 = 10,221.20 : x
  2. Step 2: Convert to fraction form
    10,921.04/16,366.92 = 10,221.20/x
  3. Step 3: Cross multiply
    10,921.04x = 16,366.92 × 10,221.20
  4. Step 4: Simplify right side
    10,921.04x = 167,289,562.70
  5. Step 5: Solve for x
    x = 167,289,562.70/10,921.04
  6. Step 6: Final answer
    x = 15,318.10

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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.