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Finding the Fourth Proportional to 8,912.18, 12,298.65 and 4,933.20

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Solution

The fourth proportional to 8,912.18, 12,298.65 and 4,933.20 is: 6,807.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.18 : 12,298.65 = 4,933.20 : x
  2. Step 2: Convert to fraction form
    8,912.18/12,298.65 = 4,933.20/x
  3. Step 3: Cross multiply
    8,912.18x = 12,298.65 × 4,933.20
  4. Step 4: Simplify right side
    8,912.18x = 60,671,700.18
  5. Step 5: Solve for x
    x = 60,671,700.18/8,912.18
  6. Step 6: Final answer
    x = 6,807.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.