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Finding the Fourth Proportional to 13,010.78, 17,954.88 and 7,042.46

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Solution

The fourth proportional to 13,010.78, 17,954.88 and 7,042.46 is: 9,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,010.78 : 17,954.88 = 7,042.46 : x
  2. Step 2: Convert to fraction form
    13,010.78/17,954.88 = 7,042.46/x
  3. Step 3: Cross multiply
    13,010.78x = 17,954.88 × 7,042.46
  4. Step 4: Simplify right side
    13,010.78x = 126,446,524.20
  5. Step 5: Solve for x
    x = 126,446,524.20/13,010.78
  6. Step 6: Final answer
    x = 9,718.60

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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.