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Finding the Fourth Proportional to 12,278.76, 16,944.24 and 7,243.20

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Solution

The fourth proportional to 12,278.76, 16,944.24 and 7,243.20 is: 9,995.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.76 : 16,944.24 = 7,243.20 : x
  2. Step 2: Convert to fraction form
    12,278.76/16,944.24 = 7,243.20/x
  3. Step 3: Cross multiply
    12,278.76x = 16,944.24 × 7,243.20
  4. Step 4: Simplify right side
    12,278.76x = 122,730,519.17
  5. Step 5: Solve for x
    x = 122,730,519.17/12,278.76
  6. Step 6: Final answer
    x = 9,995.35

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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.