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Finding the Fourth Proportional to 25,987.77, 38,986.47 and 8,222.90

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Solution

The fourth proportional to 25,987.77, 38,986.47 and 8,222.90 is: 12,335.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,987.77 : 38,986.47 = 8,222.90 : x
  2. Step 2: Convert to fraction form
    25,987.77/38,986.47 = 8,222.90/x
  3. Step 3: Cross multiply
    25,987.77x = 38,986.47 × 8,222.90
  4. Step 4: Simplify right side
    25,987.77x = 320,581,983.89
  5. Step 5: Solve for x
    x = 320,581,983.89/25,987.77
  6. Step 6: Final answer
    x = 12,335.88

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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.