Home / 9,120.60-13,672.80-5,418.90

Finding the Fourth Proportional to 9,120.60, 13,672.80 and 5,418.90

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Solution

The fourth proportional to 9,120.60, 13,672.80 and 5,418.90 is: 8,123.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.60 : 13,672.80 = 5,418.90 : x
  2. Step 2: Convert to fraction form
    9,120.60/13,672.80 = 5,418.90/x
  3. Step 3: Cross multiply
    9,120.60x = 13,672.80 × 5,418.90
  4. Step 4: Simplify right side
    9,120.60x = 74,091,535.92
  5. Step 5: Solve for x
    x = 74,091,535.92/9,120.60
  6. Step 6: Final answer
    x = 8,123.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.