Home / 20,515.14-30,707.01-10,640.88

Finding the Fourth Proportional to 20,515.14, 30,707.01 and 10,640.88

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Solution

The fourth proportional to 20,515.14, 30,707.01 and 10,640.88 is: 15,927.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.14 : 30,707.01 = 10,640.88 : x
  2. Step 2: Convert to fraction form
    20,515.14/30,707.01 = 10,640.88/x
  3. Step 3: Cross multiply
    20,515.14x = 30,707.01 × 10,640.88
  4. Step 4: Simplify right side
    20,515.14x = 326,749,608.57
  5. Step 5: Solve for x
    x = 326,749,608.57/20,515.14
  6. Step 6: Final answer
    x = 15,927.24

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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.