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Finding the Fourth Proportional to 25,831, 35,641.28 and 15,216.76

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Solution

The fourth proportional to 25,831, 35,641.28 and 15,216.76 is: 20,995.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,831 : 35,641.28 = 15,216.76 : x
  2. Step 2: Convert to fraction form
    25,831/35,641.28 = 15,216.76/x
  3. Step 3: Cross multiply
    25,831x = 35,641.28 × 15,216.76
  4. Step 4: Simplify right side
    25,831x = 542,344,803.85
  5. Step 5: Solve for x
    x = 542,344,803.85/25,831
  6. Step 6: Final answer
    x = 20,995.89

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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.