Home / 10,221.81-15,331.18-3,200.19

Finding the Fourth Proportional to 10,221.81, 15,331.18 and 3,200.19

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Solution

The fourth proportional to 10,221.81, 15,331.18 and 3,200.19 is: 4,799.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.81 : 15,331.18 = 3,200.19 : x
  2. Step 2: Convert to fraction form
    10,221.81/15,331.18 = 3,200.19/x
  3. Step 3: Cross multiply
    10,221.81x = 15,331.18 × 3,200.19
  4. Step 4: Simplify right side
    10,221.81x = 49,062,688.92
  5. Step 5: Solve for x
    x = 49,062,688.92/10,221.81
  6. Step 6: Final answer
    x = 4,799.80

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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.