Home / 25,642.40-38,431.20-18,708.80

Finding the Fourth Proportional to 25,642.40, 38,431.20 and 18,708.80

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Solution

The fourth proportional to 25,642.40, 38,431.20 and 18,708.80 is: 28,039.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,642.40 : 38,431.20 = 18,708.80 : x
  2. Step 2: Convert to fraction form
    25,642.40/38,431.20 = 18,708.80/x
  3. Step 3: Cross multiply
    25,642.40x = 38,431.20 × 18,708.80
  4. Step 4: Simplify right side
    25,642.40x = 719,001,634.56
  5. Step 5: Solve for x
    x = 719,001,634.56/25,642.40
  6. Step 6: Final answer
    x = 28,039.56

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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.