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Finding the Fourth Proportional to 13,373.61, 18,449.78 and 8,065.48

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Solution

The fourth proportional to 13,373.61, 18,449.78 and 8,065.48 is: 11,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,373.61 : 18,449.78 = 8,065.48 : x
  2. Step 2: Convert to fraction form
    13,373.61/18,449.78 = 8,065.48/x
  3. Step 3: Cross multiply
    13,373.61x = 18,449.78 × 8,065.48
  4. Step 4: Simplify right side
    13,373.61x = 148,806,331.59
  5. Step 5: Solve for x
    x = 148,806,331.59/13,373.61
  6. Step 6: Final answer
    x = 11,126.86

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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.