Home / 25,149.60-34,718.40-15,721.20

Finding the Fourth Proportional to 25,149.60, 34,718.40 and 15,721.20

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Solution

The fourth proportional to 25,149.60, 34,718.40 and 15,721.20 is: 21,702.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,149.60 : 34,718.40 = 15,721.20 : x
  2. Step 2: Convert to fraction form
    25,149.60/34,718.40 = 15,721.20/x
  3. Step 3: Cross multiply
    25,149.60x = 34,718.40 × 15,721.20
  4. Step 4: Simplify right side
    25,149.60x = 545,814,910.08
  5. Step 5: Solve for x
    x = 545,814,910.08/25,149.60
  6. Step 6: Final answer
    x = 21,702.73

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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.