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Finding the Fourth Proportional to 15,157.41, 20,916.68 and 8,869.65

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Solution

The fourth proportional to 15,157.41, 20,916.68 and 8,869.65 is: 12,239.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.41 : 20,916.68 = 8,869.65 : x
  2. Step 2: Convert to fraction form
    15,157.41/20,916.68 = 8,869.65/x
  3. Step 3: Cross multiply
    15,157.41x = 20,916.68 × 8,869.65
  4. Step 4: Simplify right side
    15,157.41x = 185,523,586.41
  5. Step 5: Solve for x
    x = 185,523,586.41/15,157.41
  6. Step 6: Final answer
    x = 12,239.79

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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.