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Finding the Fourth Proportional to 10,581.21, 15,872.33 and 8,728.89

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Solution

The fourth proportional to 10,581.21, 15,872.33 and 8,728.89 is: 13,093.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,581.21 : 15,872.33 = 8,728.89 : x
  2. Step 2: Convert to fraction form
    10,581.21/15,872.33 = 8,728.89/x
  3. Step 3: Cross multiply
    10,581.21x = 15,872.33 × 8,728.89
  4. Step 4: Simplify right side
    10,581.21x = 138,547,778.97
  5. Step 5: Solve for x
    x = 138,547,778.97/10,581.21
  6. Step 6: Final answer
    x = 13,093.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.