Home / 13,387.80-18,475.66-8,081.60

Finding the Fourth Proportional to 13,387.80, 18,475.66 and 8,081.60

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Solution

The fourth proportional to 13,387.80, 18,475.66 and 8,081.60 is: 11,152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.80 : 18,475.66 = 8,081.60 : x
  2. Step 2: Convert to fraction form
    13,387.80/18,475.66 = 8,081.60/x
  3. Step 3: Cross multiply
    13,387.80x = 18,475.66 × 8,081.60
  4. Step 4: Simplify right side
    13,387.80x = 149,312,811.58
  5. Step 5: Solve for x
    x = 149,312,811.58/13,387.80
  6. Step 6: Final answer
    x = 11,152.90

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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.