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Finding the Fourth Proportional to 8,798.08, 12,142.08 and 7,221.76

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Solution

The fourth proportional to 8,798.08, 12,142.08 and 7,221.76 is: 9,966.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,798.08 : 12,142.08 = 7,221.76 : x
  2. Step 2: Convert to fraction form
    8,798.08/12,142.08 = 7,221.76/x
  3. Step 3: Cross multiply
    8,798.08x = 12,142.08 × 7,221.76
  4. Step 4: Simplify right side
    8,798.08x = 87,687,187.66
  5. Step 5: Solve for x
    x = 87,687,187.66/8,798.08
  6. Step 6: Final answer
    x = 9,966.63

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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.