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Finding the Fourth Proportional to 10,630.80, 15,946.20 and 9,205.20

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Solution

The fourth proportional to 10,630.80, 15,946.20 and 9,205.20 is: 13,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,630.80 : 15,946.20 = 9,205.20 : x
  2. Step 2: Convert to fraction form
    10,630.80/15,946.20 = 9,205.20/x
  3. Step 3: Cross multiply
    10,630.80x = 15,946.20 × 9,205.20
  4. Step 4: Simplify right side
    10,630.80x = 146,787,960.24
  5. Step 5: Solve for x
    x = 146,787,960.24/10,630.80
  6. Step 6: Final answer
    x = 13,807.80

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Similar ratio
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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.