Home / 20,920.75-31,357.40-10,377.59

Finding the Fourth Proportional to 20,920.75, 31,357.40 and 10,377.59

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Solution

The fourth proportional to 20,920.75, 31,357.40 and 10,377.59 is: 15,554.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.75 : 31,357.40 = 10,377.59 : x
  2. Step 2: Convert to fraction form
    20,920.75/31,357.40 = 10,377.59/x
  3. Step 3: Cross multiply
    20,920.75x = 31,357.40 × 10,377.59
  4. Step 4: Simplify right side
    20,920.75x = 325,414,266.61
  5. Step 5: Solve for x
    x = 325,414,266.61/20,920.75
  6. Step 6: Final answer
    x = 15,554.62

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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.