Home / 7,487.21-10,331.05-4,800.78

Finding the Fourth Proportional to 7,487.21, 10,331.05 and 4,800.78

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Solution

The fourth proportional to 7,487.21, 10,331.05 and 4,800.78 is: 6,624.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.21 : 10,331.05 = 4,800.78 : x
  2. Step 2: Convert to fraction form
    7,487.21/10,331.05 = 4,800.78/x
  3. Step 3: Cross multiply
    7,487.21x = 10,331.05 × 4,800.78
  4. Step 4: Simplify right side
    7,487.21x = 49,597,046.56
  5. Step 5: Solve for x
    x = 49,597,046.56/7,487.21
  6. Step 6: Final answer
    x = 6,624.24

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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.