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Finding the Fourth Proportional to 12,215.10, 16,848.09 and 7,500.90

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Solution

The fourth proportional to 12,215.10, 16,848.09 and 7,500.90 is: 10,345.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.10 : 16,848.09 = 7,500.90 : x
  2. Step 2: Convert to fraction form
    12,215.10/16,848.09 = 7,500.90/x
  3. Step 3: Cross multiply
    12,215.10x = 16,848.09 × 7,500.90
  4. Step 4: Simplify right side
    12,215.10x = 126,375,838.28
  5. Step 5: Solve for x
    x = 126,375,838.28/12,215.10
  6. Step 6: Final answer
    x = 10,345.87

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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.