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Finding the Fourth Proportional to 10,576.80, 15,865.20 and 9,280.80

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Solution

The fourth proportional to 10,576.80, 15,865.20 and 9,280.80 is: 13,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,576.80 : 15,865.20 = 9,280.80 : x
  2. Step 2: Convert to fraction form
    10,576.80/15,865.20 = 9,280.80/x
  3. Step 3: Cross multiply
    10,576.80x = 15,865.20 × 9,280.80
  4. Step 4: Simplify right side
    10,576.80x = 147,241,748.16
  5. Step 5: Solve for x
    x = 147,241,748.16/10,576.80
  6. Step 6: Final answer
    x = 13,921.20

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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.