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Finding the Fourth Proportional to 15,986.76, 22,061.44 and 8,913

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Solution

The fourth proportional to 15,986.76, 22,061.44 and 8,913 is: 12,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,986.76 : 22,061.44 = 8,913 : x
  2. Step 2: Convert to fraction form
    15,986.76/22,061.44 = 8,913/x
  3. Step 3: Cross multiply
    15,986.76x = 22,061.44 × 8,913
  4. Step 4: Simplify right side
    15,986.76x = 196,633,614.72
  5. Step 5: Solve for x
    x = 196,633,614.72/15,986.76
  6. Step 6: Final answer
    x = 12,299.78

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Double scale
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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.