Home / 20,215.10-30,301.05-9,119.90

Finding the Fourth Proportional to 20,215.10, 30,301.05 and 9,119.90

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Solution

The fourth proportional to 20,215.10, 30,301.05 and 9,119.90 is: 13,670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.10 : 30,301.05 = 9,119.90 : x
  2. Step 2: Convert to fraction form
    20,215.10/30,301.05 = 9,119.90/x
  3. Step 3: Cross multiply
    20,215.10x = 30,301.05 × 9,119.90
  4. Step 4: Simplify right side
    20,215.10x = 276,342,545.90
  5. Step 5: Solve for x
    x = 276,342,545.90/20,215.10
  6. Step 6: Final answer
    x = 13,670.11

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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.