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Finding the Fourth Proportional to 13,097.88, 18,074.97 and 7,129.53

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Solution

The fourth proportional to 13,097.88, 18,074.97 and 7,129.53 is: 9,838.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,097.88 : 18,074.97 = 7,129.53 : x
  2. Step 2: Convert to fraction form
    13,097.88/18,074.97 = 7,129.53/x
  3. Step 3: Cross multiply
    13,097.88x = 18,074.97 × 7,129.53
  4. Step 4: Simplify right side
    13,097.88x = 128,866,040.86
  5. Step 5: Solve for x
    x = 128,866,040.86/13,097.88
  6. Step 6: Final answer
    x = 9,838.69

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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.