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Finding the Fourth Proportional to 11,508.62, 15,872.06 and 7,929.29

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Solution

The fourth proportional to 11,508.62, 15,872.06 and 7,929.29 is: 10,935.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,508.62 : 15,872.06 = 7,929.29 : x
  2. Step 2: Convert to fraction form
    11,508.62/15,872.06 = 7,929.29/x
  3. Step 3: Cross multiply
    11,508.62x = 15,872.06 × 7,929.29
  4. Step 4: Simplify right side
    11,508.62x = 125,854,166.64
  5. Step 5: Solve for x
    x = 125,854,166.64/11,508.62
  6. Step 6: Final answer
    x = 10,935.64

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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.