Home / 13,390.13-18,478.38-8,086.25

Finding the Fourth Proportional to 13,390.13, 18,478.38 and 8,086.25

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Solution

The fourth proportional to 13,390.13, 18,478.38 and 8,086.25 is: 11,159.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.13 : 18,478.38 = 8,086.25 : x
  2. Step 2: Convert to fraction form
    13,390.13/18,478.38 = 8,086.25/x
  3. Step 3: Cross multiply
    13,390.13x = 18,478.38 × 8,086.25
  4. Step 4: Simplify right side
    13,390.13x = 149,420,707.88
  5. Step 5: Solve for x
    x = 149,420,707.88/13,390.13
  6. Step 6: Final answer
    x = 11,159.02

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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.