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Finding the Fourth Proportional to 12,342.78, 17,010.54 and 10,909.08

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Solution

The fourth proportional to 12,342.78, 17,010.54 and 10,909.08 is: 15,034.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,342.78 : 17,010.54 = 10,909.08 : x
  2. Step 2: Convert to fraction form
    12,342.78/17,010.54 = 10,909.08/x
  3. Step 3: Cross multiply
    12,342.78x = 17,010.54 × 10,909.08
  4. Step 4: Simplify right side
    12,342.78x = 185,569,341.70
  5. Step 5: Solve for x
    x = 185,569,341.70/12,342.78
  6. Step 6: Final answer
    x = 15,034.65

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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.