Home / 7,109.12-9,809.60-3,964.70

Finding the Fourth Proportional to 7,109.12, 9,809.60 and 3,964.70

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Solution

The fourth proportional to 7,109.12, 9,809.60 and 3,964.70 is: 5,470.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.12 : 9,809.60 = 3,964.70 : x
  2. Step 2: Convert to fraction form
    7,109.12/9,809.60 = 3,964.70/x
  3. Step 3: Cross multiply
    7,109.12x = 9,809.60 × 3,964.70
  4. Step 4: Simplify right side
    7,109.12x = 38,892,121.12
  5. Step 5: Solve for x
    x = 38,892,121.12/7,109.12
  6. Step 6: Final answer
    x = 5,470.74

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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.