Home / 20,920.95-31,381.41-5,338.58

Finding the Fourth Proportional to 20,920.95, 31,381.41 and 5,338.58

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Solution

The fourth proportional to 20,920.95, 31,381.41 and 5,338.58 is: 8,007.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.95 : 31,381.41 = 5,338.58 : x
  2. Step 2: Convert to fraction form
    20,920.95/31,381.41 = 5,338.58/x
  3. Step 3: Cross multiply
    20,920.95x = 31,381.41 × 5,338.58
  4. Step 4: Simplify right side
    20,920.95x = 167,532,148.59
  5. Step 5: Solve for x
    x = 167,532,148.59/20,920.95
  6. Step 6: Final answer
    x = 8,007.86

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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.