Home / 28,367.28-39,146.52-15,620.20

Finding the Fourth Proportional to 28,367.28, 39,146.52 and 15,620.20

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Solution

The fourth proportional to 28,367.28, 39,146.52 and 15,620.20 is: 21,555.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,367.28 : 39,146.52 = 15,620.20 : x
  2. Step 2: Convert to fraction form
    28,367.28/39,146.52 = 15,620.20/x
  3. Step 3: Cross multiply
    28,367.28x = 39,146.52 × 15,620.20
  4. Step 4: Simplify right side
    28,367.28x = 611,476,471.70
  5. Step 5: Solve for x
    x = 611,476,471.70/28,367.28
  6. Step 6: Final answer
    x = 21,555.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.