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Finding the Fourth Proportional to 12,793.78, 17,656.68 and 7,488.28

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Solution

The fourth proportional to 12,793.78, 17,656.68 and 7,488.28 is: 10,334.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,793.78 : 17,656.68 = 7,488.28 : x
  2. Step 2: Convert to fraction form
    12,793.78/17,656.68 = 7,488.28/x
  3. Step 3: Cross multiply
    12,793.78x = 17,656.68 × 7,488.28
  4. Step 4: Simplify right side
    12,793.78x = 132,218,163.71
  5. Step 5: Solve for x
    x = 132,218,163.71/12,793.78
  6. Step 6: Final answer
    x = 10,334.57

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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.