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Finding the Fourth Proportional to 13,240.61, 18,272.39 and 7,497.61

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Solution

The fourth proportional to 13,240.61, 18,272.39 and 7,497.61 is: 10,346.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.61 : 18,272.39 = 7,497.61 : x
  2. Step 2: Convert to fraction form
    13,240.61/18,272.39 = 7,497.61/x
  3. Step 3: Cross multiply
    13,240.61x = 18,272.39 × 7,497.61
  4. Step 4: Simplify right side
    13,240.61x = 136,999,272.73
  5. Step 5: Solve for x
    x = 136,999,272.73/13,240.61
  6. Step 6: Final answer
    x = 10,346.90

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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.