Home / 25,345.20-37,974.60-20,938.80

Finding the Fourth Proportional to 25,345.20, 37,974.60 and 20,938.80

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Solution

The fourth proportional to 25,345.20, 37,974.60 and 20,938.80 is: 31,372.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,345.20 : 37,974.60 = 20,938.80 : x
  2. Step 2: Convert to fraction form
    25,345.20/37,974.60 = 20,938.80/x
  3. Step 3: Cross multiply
    25,345.20x = 37,974.60 × 20,938.80
  4. Step 4: Simplify right side
    25,345.20x = 795,142,554.48
  5. Step 5: Solve for x
    x = 795,142,554.48/25,345.20
  6. Step 6: Final answer
    x = 31,372.51

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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.