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Finding the Fourth Proportional to 10,108.80, 13,996.80 and 9,331.20

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Solution

The fourth proportional to 10,108.80, 13,996.80 and 9,331.20 is: 12,920.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,108.80 : 13,996.80 = 9,331.20 : x
  2. Step 2: Convert to fraction form
    10,108.80/13,996.80 = 9,331.20/x
  3. Step 3: Cross multiply
    10,108.80x = 13,996.80 × 9,331.20
  4. Step 4: Simplify right side
    10,108.80x = 130,606,940.16
  5. Step 5: Solve for x
    x = 130,606,940.16/10,108.80
  6. Step 6: Final answer
    x = 12,920.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.