Home / 7,780.95-11,668.38-3,620.18

Finding the Fourth Proportional to 7,780.95, 11,668.38 and 3,620.18

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Solution

The fourth proportional to 7,780.95, 11,668.38 and 3,620.18 is: 5,428.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.95 : 11,668.38 = 3,620.18 : x
  2. Step 2: Convert to fraction form
    7,780.95/11,668.38 = 3,620.18/x
  3. Step 3: Cross multiply
    7,780.95x = 11,668.38 × 3,620.18
  4. Step 4: Simplify right side
    7,780.95x = 42,241,577.57
  5. Step 5: Solve for x
    x = 42,241,577.57/7,780.95
  6. Step 6: Final answer
    x = 5,428.85

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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.