Home / 20,068.40-30,121.11-10,214.78

Finding the Fourth Proportional to 20,068.40, 30,121.11 and 10,214.78

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Solution

The fourth proportional to 20,068.40, 30,121.11 and 10,214.78 is: 15,331.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,068.40 : 30,121.11 = 10,214.78 : x
  2. Step 2: Convert to fraction form
    20,068.40/30,121.11 = 10,214.78/x
  3. Step 3: Cross multiply
    20,068.40x = 30,121.11 × 10,214.78
  4. Step 4: Simplify right side
    20,068.40x = 307,680,512.01
  5. Step 5: Solve for x
    x = 307,680,512.01/20,068.40
  6. Step 6: Final answer
    x = 15,331.59

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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.