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Finding the Fourth Proportional to 15,576.17, 21,494.84 and 8,861.65

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Solution

The fourth proportional to 15,576.17, 21,494.84 and 8,861.65 is: 12,228.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,576.17 : 21,494.84 = 8,861.65 : x
  2. Step 2: Convert to fraction form
    15,576.17/21,494.84 = 8,861.65/x
  3. Step 3: Cross multiply
    15,576.17x = 21,494.84 × 8,861.65
  4. Step 4: Simplify right side
    15,576.17x = 190,479,708.41
  5. Step 5: Solve for x
    x = 190,479,708.41/15,576.17
  6. Step 6: Final answer
    x = 12,228.92

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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.