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Finding the Fourth Proportional to 9,347.31, 12,916.40 and 8,891.73

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Solution

The fourth proportional to 9,347.31, 12,916.40 and 8,891.73 is: 12,286.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,347.31 : 12,916.40 = 8,891.73 : x
  2. Step 2: Convert to fraction form
    9,347.31/12,916.40 = 8,891.73/x
  3. Step 3: Cross multiply
    9,347.31x = 12,916.40 × 8,891.73
  4. Step 4: Simplify right side
    9,347.31x = 114,849,096.91
  5. Step 5: Solve for x
    x = 114,849,096.91/9,347.31
  6. Step 6: Final answer
    x = 12,286.86

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1.5x scale

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.