Home / 13,308.88-18,363.72-9,115.60

Finding the Fourth Proportional to 13,308.88, 18,363.72 and 9,115.60

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Solution

The fourth proportional to 13,308.88, 18,363.72 and 9,115.60 is: 12,577.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308.88 : 18,363.72 = 9,115.60 : x
  2. Step 2: Convert to fraction form
    13,308.88/18,363.72 = 9,115.60/x
  3. Step 3: Cross multiply
    13,308.88x = 18,363.72 × 9,115.60
  4. Step 4: Simplify right side
    13,308.88x = 167,396,326.03
  5. Step 5: Solve for x
    x = 167,396,326.03/13,308.88
  6. Step 6: Final answer
    x = 12,577.79

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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.