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Finding the Fourth Proportional to 11,487.76, 15,853.12 and 6,519.76

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Solution

The fourth proportional to 11,487.76, 15,853.12 and 6,519.76 is: 8,997.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.76 : 15,853.12 = 6,519.76 : x
  2. Step 2: Convert to fraction form
    11,487.76/15,853.12 = 6,519.76/x
  3. Step 3: Cross multiply
    11,487.76x = 15,853.12 × 6,519.76
  4. Step 4: Simplify right side
    11,487.76x = 103,358,537.65
  5. Step 5: Solve for x
    x = 103,358,537.65/11,487.76
  6. Step 6: Final answer
    x = 8,997.28

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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.