Home / 20,129.70-30,162.15-10,254.18

Finding the Fourth Proportional to 20,129.70, 30,162.15 and 10,254.18

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Solution

The fourth proportional to 20,129.70, 30,162.15 and 10,254.18 is: 15,364.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.70 : 30,162.15 = 10,254.18 : x
  2. Step 2: Convert to fraction form
    20,129.70/30,162.15 = 10,254.18/x
  3. Step 3: Cross multiply
    20,129.70x = 30,162.15 × 10,254.18
  4. Step 4: Simplify right side
    20,129.70x = 309,288,115.29
  5. Step 5: Solve for x
    x = 309,288,115.29/20,129.70
  6. Step 6: Final answer
    x = 15,364.77

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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.