Home / 20,689.35-31,034.09-5,106.97

Finding the Fourth Proportional to 20,689.35, 31,034.09 and 5,106.97

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Solution

The fourth proportional to 20,689.35, 31,034.09 and 5,106.97 is: 7,660.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.35 : 31,034.09 = 5,106.97 : x
  2. Step 2: Convert to fraction form
    20,689.35/31,034.09 = 5,106.97/x
  3. Step 3: Cross multiply
    20,689.35x = 31,034.09 × 5,106.97
  4. Step 4: Simplify right side
    20,689.35x = 158,490,141.07
  5. Step 5: Solve for x
    x = 158,490,141.07/20,689.35
  6. Step 6: Final answer
    x = 7,660.47

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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.