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Finding the Fourth Proportional to 28,401.32, 42,607.88 and 9,679.88

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Solution

The fourth proportional to 28,401.32, 42,607.88 and 9,679.88 is: 14,521.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401.32 : 42,607.88 = 9,679.88 : x
  2. Step 2: Convert to fraction form
    28,401.32/42,607.88 = 9,679.88/x
  3. Step 3: Cross multiply
    28,401.32x = 42,607.88 × 9,679.88
  4. Step 4: Simplify right side
    28,401.32x = 412,439,165.45
  5. Step 5: Solve for x
    x = 412,439,165.45/28,401.32
  6. Step 6: Final answer
    x = 14,521.83

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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.