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Finding the Fourth Proportional to 15,644.53, 21,591.26 and 8,931.12

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Solution

The fourth proportional to 15,644.53, 21,591.26 and 8,931.12 is: 12,325.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,644.53 : 21,591.26 = 8,931.12 : x
  2. Step 2: Convert to fraction form
    15,644.53/21,591.26 = 8,931.12/x
  3. Step 3: Cross multiply
    15,644.53x = 21,591.26 × 8,931.12
  4. Step 4: Simplify right side
    15,644.53x = 192,834,134.01
  5. Step 5: Solve for x
    x = 192,834,134.01/15,644.53
  6. Step 6: Final answer
    x = 12,325.98

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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.