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Finding the Fourth Proportional to 10,655.60, 15,964.20 and 9,426.80

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Solution

The fourth proportional to 10,655.60, 15,964.20 and 9,426.80 is: 14,123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,655.60 : 15,964.20 = 9,426.80 : x
  2. Step 2: Convert to fraction form
    10,655.60/15,964.20 = 9,426.80/x
  3. Step 3: Cross multiply
    10,655.60x = 15,964.20 × 9,426.80
  4. Step 4: Simplify right side
    10,655.60x = 150,491,320.56
  5. Step 5: Solve for x
    x = 150,491,320.56/10,655.60
  6. Step 6: Final answer
    x = 14,123.21

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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.