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Finding the Fourth Proportional to 12,041.28, 18,047.28 and 8,525.88

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Solution

The fourth proportional to 12,041.28, 18,047.28 and 8,525.88 is: 12,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,041.28 : 18,047.28 = 8,525.88 : x
  2. Step 2: Convert to fraction form
    12,041.28/18,047.28 = 8,525.88/x
  3. Step 3: Cross multiply
    12,041.28x = 18,047.28 × 8,525.88
  4. Step 4: Simplify right side
    12,041.28x = 153,868,943.61
  5. Step 5: Solve for x
    x = 153,868,943.61/12,041.28
  6. Step 6: Final answer
    x = 12,778.45

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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.