Home / 20,718.78-31,082.66-7,571.13

Finding the Fourth Proportional to 20,718.78, 31,082.66 and 7,571.13

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Solution

The fourth proportional to 20,718.78, 31,082.66 and 7,571.13 is: 11,358.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.78 : 31,082.66 = 7,571.13 : x
  2. Step 2: Convert to fraction form
    20,718.78/31,082.66 = 7,571.13/x
  3. Step 3: Cross multiply
    20,718.78x = 31,082.66 × 7,571.13
  4. Step 4: Simplify right side
    20,718.78x = 235,330,859.61
  5. Step 5: Solve for x
    x = 235,330,859.61/20,718.78
  6. Step 6: Final answer
    x = 11,358.34

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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.