Home / 4,747.50-7,121.28-1,284.78

Finding the Fourth Proportional to 4,747.50, 7,121.28 and 1,284.78

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Solution

The fourth proportional to 4,747.50, 7,121.28 and 1,284.78 is: 1,927.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,747.50 : 7,121.28 = 1,284.78 : x
  2. Step 2: Convert to fraction form
    4,747.50/7,121.28 = 1,284.78/x
  3. Step 3: Cross multiply
    4,747.50x = 7,121.28 × 1,284.78
  4. Step 4: Simplify right side
    4,747.50x = 9,149,278.12
  5. Step 5: Solve for x
    x = 9,149,278.12/4,747.50
  6. Step 6: Final answer
    x = 1,927.18

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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.