Home / 7,764.40-10,715-4,227.68

Finding the Fourth Proportional to 7,764.40, 10,715 and 4,227.68

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Solution

The fourth proportional to 7,764.40, 10,715 and 4,227.68 is: 5,834.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,764.40 : 10,715 = 4,227.68 : x
  2. Step 2: Convert to fraction form
    7,764.40/10,715 = 4,227.68/x
  3. Step 3: Cross multiply
    7,764.40x = 10,715 × 4,227.68
  4. Step 4: Simplify right side
    7,764.40x = 45,299,591.20
  5. Step 5: Solve for x
    x = 45,299,591.20/7,764.40
  6. Step 6: Final answer
    x = 5,834.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.