Home / 13,599.12-18,767.28-8,290.20

Finding the Fourth Proportional to 13,599.12, 18,767.28 and 8,290.20

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Solution

The fourth proportional to 13,599.12, 18,767.28 and 8,290.20 is: 11,440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.12 : 18,767.28 = 8,290.20 : x
  2. Step 2: Convert to fraction form
    13,599.12/18,767.28 = 8,290.20/x
  3. Step 3: Cross multiply
    13,599.12x = 18,767.28 × 8,290.20
  4. Step 4: Simplify right side
    13,599.12x = 155,584,504.66
  5. Step 5: Solve for x
    x = 155,584,504.66/13,599.12
  6. Step 6: Final answer
    x = 11,440.78

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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.