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Finding the Fourth Proportional to 12,800.72, 17,669.44 and 7,497.28

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Solution

The fourth proportional to 12,800.72, 17,669.44 and 7,497.28 is: 10,348.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,800.72 : 17,669.44 = 7,497.28 : x
  2. Step 2: Convert to fraction form
    12,800.72/17,669.44 = 7,497.28/x
  3. Step 3: Cross multiply
    12,800.72x = 17,669.44 × 7,497.28
  4. Step 4: Simplify right side
    12,800.72x = 132,472,739.12
  5. Step 5: Solve for x
    x = 132,472,739.12/12,800.72
  6. Step 6: Final answer
    x = 10,348.85

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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.