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Finding the Fourth Proportional to 18,310.32, 27,458.98 and 7,916.40

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Solution

The fourth proportional to 18,310.32, 27,458.98 and 7,916.40 is: 11,871.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,310.32 : 27,458.98 = 7,916.40 : x
  2. Step 2: Convert to fraction form
    18,310.32/27,458.98 = 7,916.40/x
  3. Step 3: Cross multiply
    18,310.32x = 27,458.98 × 7,916.40
  4. Step 4: Simplify right side
    18,310.32x = 217,376,269.27
  5. Step 5: Solve for x
    x = 217,376,269.27/18,310.32
  6. Step 6: Final answer
    x = 11,871.79

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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.