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Finding the Fourth Proportional to 18,618.14, 27,916.41 and 7,515.74

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Solution

The fourth proportional to 18,618.14, 27,916.41 and 7,515.74 is: 11,269.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.14 : 27,916.41 = 7,515.74 : x
  2. Step 2: Convert to fraction form
    18,618.14/27,916.41 = 7,515.74/x
  3. Step 3: Cross multiply
    18,618.14x = 27,916.41 × 7,515.74
  4. Step 4: Simplify right side
    18,618.14x = 209,812,479.29
  5. Step 5: Solve for x
    x = 209,812,479.29/18,618.14
  6. Step 6: Final answer
    x = 11,269.25

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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.