Home / 9,121.20-12,585.96-6,470.88

Finding the Fourth Proportional to 9,121.20, 12,585.96 and 6,470.88

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Solution

The fourth proportional to 9,121.20, 12,585.96 and 6,470.88 is: 8,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.20 : 12,585.96 = 6,470.88 : x
  2. Step 2: Convert to fraction form
    9,121.20/12,585.96 = 6,470.88/x
  3. Step 3: Cross multiply
    9,121.20x = 12,585.96 × 6,470.88
  4. Step 4: Simplify right side
    9,121.20x = 81,442,236.84
  5. Step 5: Solve for x
    x = 81,442,236.84/9,121.20
  6. Step 6: Final answer
    x = 8,928.89

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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.