Home / 20,158.20-30,212.10-10,301.40

Finding the Fourth Proportional to 20,158.20, 30,212.10 and 10,301.40

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Solution

The fourth proportional to 20,158.20, 30,212.10 and 10,301.40 is: 15,439.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.20 : 30,212.10 = 10,301.40 : x
  2. Step 2: Convert to fraction form
    20,158.20/30,212.10 = 10,301.40/x
  3. Step 3: Cross multiply
    20,158.20x = 30,212.10 × 10,301.40
  4. Step 4: Simplify right side
    20,158.20x = 311,226,926.94
  5. Step 5: Solve for x
    x = 311,226,926.94/20,158.20
  6. Step 6: Final answer
    x = 15,439.22

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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.