Home / 25,728.55-38,640.35-15,403.75

Finding the Fourth Proportional to 25,728.55, 38,640.35 and 15,403.75

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Solution

The fourth proportional to 25,728.55, 38,640.35 and 15,403.75 is: 23,134.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,728.55 : 38,640.35 = 15,403.75 : x
  2. Step 2: Convert to fraction form
    25,728.55/38,640.35 = 15,403.75/x
  3. Step 3: Cross multiply
    25,728.55x = 38,640.35 × 15,403.75
  4. Step 4: Simplify right side
    25,728.55x = 595,206,291.31
  5. Step 5: Solve for x
    x = 595,206,291.31/25,728.55
  6. Step 6: Final answer
    x = 23,134.08

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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.