Home / 20,701.38-28,579.14-15,625.38

Finding the Fourth Proportional to 20,701.38, 28,579.14 and 15,625.38

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Solution

The fourth proportional to 20,701.38, 28,579.14 and 15,625.38 is: 21,571.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.38 : 28,579.14 = 15,625.38 : x
  2. Step 2: Convert to fraction form
    20,701.38/28,579.14 = 15,625.38/x
  3. Step 3: Cross multiply
    20,701.38x = 28,579.14 × 15,625.38
  4. Step 4: Simplify right side
    20,701.38x = 446,559,922.57
  5. Step 5: Solve for x
    x = 446,559,922.57/20,701.38
  6. Step 6: Final answer
    x = 21,571.51

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Double scale
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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.