Home / 30,217.38-45,321.20-21,425.64

Finding the Fourth Proportional to 30,217.38, 45,321.20 and 21,425.64

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Solution

The fourth proportional to 30,217.38, 45,321.20 and 21,425.64 is: 32,135.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,217.38 : 45,321.20 = 21,425.64 : x
  2. Step 2: Convert to fraction form
    30,217.38/45,321.20 = 21,425.64/x
  3. Step 3: Cross multiply
    30,217.38x = 45,321.20 × 21,425.64
  4. Step 4: Simplify right side
    30,217.38x = 971,035,715.57
  5. Step 5: Solve for x
    x = 971,035,715.57/30,217.38
  6. Step 6: Final answer
    x = 32,135.01

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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.