Home / 20,708.06-31,062.40-5,125.69

Finding the Fourth Proportional to 20,708.06, 31,062.40 and 5,125.69

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Solution

The fourth proportional to 20,708.06, 31,062.40 and 5,125.69 is: 7,688.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.06 : 31,062.40 = 5,125.69 : x
  2. Step 2: Convert to fraction form
    20,708.06/31,062.40 = 5,125.69/x
  3. Step 3: Cross multiply
    20,708.06x = 31,062.40 × 5,125.69
  4. Step 4: Simplify right side
    20,708.06x = 159,216,142.59
  5. Step 5: Solve for x
    x = 159,216,142.59/20,708.06
  6. Step 6: Final answer
    x = 7,688.61

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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.