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Finding the Fourth Proportional to 13,392.88, 18,482.88 and 8,087.62

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Solution

The fourth proportional to 13,392.88, 18,482.88 and 8,087.62 is: 11,161.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.88 : 18,482.88 = 8,087.62 : x
  2. Step 2: Convert to fraction form
    13,392.88/18,482.88 = 8,087.62/x
  3. Step 3: Cross multiply
    13,392.88x = 18,482.88 × 8,087.62
  4. Step 4: Simplify right side
    13,392.88x = 149,482,509.95
  5. Step 5: Solve for x
    x = 149,482,509.95/13,392.88
  6. Step 6: Final answer
    x = 11,161.34

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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.