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Finding the Fourth Proportional to 11,487.70, 15,841.36 and 10,818

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Solution

The fourth proportional to 11,487.70, 15,841.36 and 10,818 is: 14,917.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.70 : 15,841.36 = 10,818 : x
  2. Step 2: Convert to fraction form
    11,487.70/15,841.36 = 10,818/x
  3. Step 3: Cross multiply
    11,487.70x = 15,841.36 × 10,818
  4. Step 4: Simplify right side
    11,487.70x = 171,371,832.48
  5. Step 5: Solve for x
    x = 171,371,832.48/11,487.70
  6. Step 6: Final answer
    x = 14,917.85

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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.