Home / 7,720.38-11,580.12-2,788.74

Finding the Fourth Proportional to 7,720.38, 11,580.12 and 2,788.74

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Solution

The fourth proportional to 7,720.38, 11,580.12 and 2,788.74 is: 4,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.38 : 11,580.12 = 2,788.74 : x
  2. Step 2: Convert to fraction form
    7,720.38/11,580.12 = 2,788.74/x
  3. Step 3: Cross multiply
    7,720.38x = 11,580.12 × 2,788.74
  4. Step 4: Simplify right side
    7,720.38x = 32,293,943.85
  5. Step 5: Solve for x
    x = 32,293,943.85/7,720.38
  6. Step 6: Final answer
    x = 4,182.95

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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.