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Finding the Fourth Proportional to 13,392.78, 18,482.04 and 8,087.46

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Solution

The fourth proportional to 13,392.78, 18,482.04 and 8,087.46 is: 11,160.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.78 : 18,482.04 = 8,087.46 : x
  2. Step 2: Convert to fraction form
    13,392.78/18,482.04 = 8,087.46/x
  3. Step 3: Cross multiply
    13,392.78x = 18,482.04 × 8,087.46
  4. Step 4: Simplify right side
    13,392.78x = 149,472,759.22
  5. Step 5: Solve for x
    x = 149,472,759.22/13,392.78
  6. Step 6: Final answer
    x = 11,160.70

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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.