Home / 6,990.12-9,645.20-4,159.18

Finding the Fourth Proportional to 6,990.12, 9,645.20 and 4,159.18

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Solution

The fourth proportional to 6,990.12, 9,645.20 and 4,159.18 is: 5,738.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.12 : 9,645.20 = 4,159.18 : x
  2. Step 2: Convert to fraction form
    6,990.12/9,645.20 = 4,159.18/x
  3. Step 3: Cross multiply
    6,990.12x = 9,645.20 × 4,159.18
  4. Step 4: Simplify right side
    6,990.12x = 40,116,122.94
  5. Step 5: Solve for x
    x = 40,116,122.94/6,990.12
  6. Step 6: Final answer
    x = 5,738.97

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Half scale
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Double scale
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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.