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Finding the Fourth Proportional to 15,560.21, 21,472.87 and 8,486.63

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Solution

The fourth proportional to 15,560.21, 21,472.87 and 8,486.63 is: 11,711.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,560.21 : 21,472.87 = 8,486.63 : x
  2. Step 2: Convert to fraction form
    15,560.21/21,472.87 = 8,486.63/x
  3. Step 3: Cross multiply
    15,560.21x = 21,472.87 × 8,486.63
  4. Step 4: Simplify right side
    15,560.21x = 182,232,302.73
  5. Step 5: Solve for x
    x = 182,232,302.73/15,560.21
  6. Step 6: Final answer
    x = 11,711.43

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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.