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Finding the Fourth Proportional to 13,010.88, 17,955 and 7,042.55

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Solution

The fourth proportional to 13,010.88, 17,955 and 7,042.55 is: 9,718.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,010.88 : 17,955 = 7,042.55 : x
  2. Step 2: Convert to fraction form
    13,010.88/17,955 = 7,042.55/x
  3. Step 3: Cross multiply
    13,010.88x = 17,955 × 7,042.55
  4. Step 4: Simplify right side
    13,010.88x = 126,448,895.48
  5. Step 5: Solve for x
    x = 126,448,895.48/13,010.88
  6. Step 6: Final answer
    x = 9,718.71

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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.