Home / 20,212.75-30,320.70-9,125.65

Finding the Fourth Proportional to 20,212.75, 30,320.70 and 9,125.65

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Solution

The fourth proportional to 20,212.75, 30,320.70 and 9,125.65 is: 13,689.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.75 : 30,320.70 = 9,125.65 : x
  2. Step 2: Convert to fraction form
    20,212.75/30,320.70 = 9,125.65/x
  3. Step 3: Cross multiply
    20,212.75x = 30,320.70 × 9,125.65
  4. Step 4: Simplify right side
    20,212.75x = 276,696,095.96
  5. Step 5: Solve for x
    x = 276,696,095.96/20,212.75
  6. Step 6: Final answer
    x = 13,689.19

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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.