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Finding the Fourth Proportional to 15,635.52, 21,576.58 and 8,921.01

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Solution

The fourth proportional to 15,635.52, 21,576.58 and 8,921.01 is: 12,310.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,635.52 : 21,576.58 = 8,921.01 : x
  2. Step 2: Convert to fraction form
    15,635.52/21,576.58 = 8,921.01/x
  3. Step 3: Cross multiply
    15,635.52x = 21,576.58 × 8,921.01
  4. Step 4: Simplify right side
    15,635.52x = 192,484,885.95
  5. Step 5: Solve for x
    x = 192,484,885.95/15,635.52
  6. Step 6: Final answer
    x = 12,310.74

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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.