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Finding the Fourth Proportional to 13,008.60, 17,951.76 and 7,040.21

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Solution

The fourth proportional to 13,008.60, 17,951.76 and 7,040.21 is: 9,715.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,008.60 : 17,951.76 = 7,040.21 : x
  2. Step 2: Convert to fraction form
    13,008.60/17,951.76 = 7,040.21/x
  3. Step 3: Cross multiply
    13,008.60x = 17,951.76 × 7,040.21
  4. Step 4: Simplify right side
    13,008.60x = 126,384,070.51
  5. Step 5: Solve for x
    x = 126,384,070.51/13,008.60
  6. Step 6: Final answer
    x = 9,715.42

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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.