Home / 7,489.50-11,219.49-3,780.78

Finding the Fourth Proportional to 7,489.50, 11,219.49 and 3,780.78

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Solution

The fourth proportional to 7,489.50, 11,219.49 and 3,780.78 is: 5,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.50 : 11,219.49 = 3,780.78 : x
  2. Step 2: Convert to fraction form
    7,489.50/11,219.49 = 3,780.78/x
  3. Step 3: Cross multiply
    7,489.50x = 11,219.49 × 3,780.78
  4. Step 4: Simplify right side
    7,489.50x = 42,418,423.40
  5. Step 5: Solve for x
    x = 42,418,423.40/7,489.50
  6. Step 6: Final answer
    x = 5,663.72

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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.