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Finding the Fourth Proportional to 15,111.20, 22,691.10 and 10,980.20

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Solution

The fourth proportional to 15,111.20, 22,691.10 and 10,980.20 is: 16,487.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.20 : 22,691.10 = 10,980.20 : x
  2. Step 2: Convert to fraction form
    15,111.20/22,691.10 = 10,980.20/x
  3. Step 3: Cross multiply
    15,111.20x = 22,691.10 × 10,980.20
  4. Step 4: Simplify right side
    15,111.20x = 249,152,816.22
  5. Step 5: Solve for x
    x = 249,152,816.22/15,111.20
  6. Step 6: Final answer
    x = 16,487.96

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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.