Home / 7,715.90-11,573.85-2,169.80

Finding the Fourth Proportional to 7,715.90, 11,573.85 and 2,169.80

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Solution

The fourth proportional to 7,715.90, 11,573.85 and 2,169.80 is: 3,254.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.90 : 11,573.85 = 2,169.80 : x
  2. Step 2: Convert to fraction form
    7,715.90/11,573.85 = 2,169.80/x
  3. Step 3: Cross multiply
    7,715.90x = 11,573.85 × 2,169.80
  4. Step 4: Simplify right side
    7,715.90x = 25,112,928.88
  5. Step 5: Solve for x
    x = 25,112,928.88/7,715.90
  6. Step 6: Final answer
    x = 3,254.70

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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.