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Finding the Fourth Proportional to 10,630.80, 15,908.40 and 9,259.20

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Solution

The fourth proportional to 10,630.80, 15,908.40 and 9,259.20 is: 13,855.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,630.80 : 15,908.40 = 9,259.20 : x
  2. Step 2: Convert to fraction form
    10,630.80/15,908.40 = 9,259.20/x
  3. Step 3: Cross multiply
    10,630.80x = 15,908.40 × 9,259.20
  4. Step 4: Simplify right side
    10,630.80x = 147,299,057.28
  5. Step 5: Solve for x
    x = 147,299,057.28/10,630.80
  6. Step 6: Final answer
    x = 13,855.88

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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.