Home / 6,620.14-9,930.20-1,689.78

Finding the Fourth Proportional to 6,620.14, 9,930.20 and 1,689.78

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Solution

The fourth proportional to 6,620.14, 9,930.20 and 1,689.78 is: 2,534.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.14 : 9,930.20 = 1,689.78 : x
  2. Step 2: Convert to fraction form
    6,620.14/9,930.20 = 1,689.78/x
  3. Step 3: Cross multiply
    6,620.14x = 9,930.20 × 1,689.78
  4. Step 4: Simplify right side
    6,620.14x = 16,779,795.26
  5. Step 5: Solve for x
    x = 16,779,795.26/6,620.14
  6. Step 6: Final answer
    x = 2,534.66

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Similar ratio
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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.