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Finding the Fourth Proportional to 15,443.82, 21,311.19 and 8,729.10

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Solution

The fourth proportional to 15,443.82, 21,311.19 and 8,729.10 is: 12,045.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,443.82 : 21,311.19 = 8,729.10 : x
  2. Step 2: Convert to fraction form
    15,443.82/21,311.19 = 8,729.10/x
  3. Step 3: Cross multiply
    15,443.82x = 21,311.19 × 8,729.10
  4. Step 4: Simplify right side
    15,443.82x = 186,027,508.63
  5. Step 5: Solve for x
    x = 186,027,508.63/15,443.82
  6. Step 6: Final answer
    x = 12,045.43

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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.