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Finding the Fourth Proportional to 25,988.78, 38,987.98 and 8,223.91

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Solution

The fourth proportional to 25,988.78, 38,987.98 and 8,223.91 is: 12,337.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,988.78 : 38,987.98 = 8,223.91 : x
  2. Step 2: Convert to fraction form
    25,988.78/38,987.98 = 8,223.91/x
  3. Step 3: Cross multiply
    25,988.78x = 38,987.98 × 8,223.91
  4. Step 4: Simplify right side
    25,988.78x = 320,633,739.88
  5. Step 5: Solve for x
    x = 320,633,739.88/25,988.78
  6. Step 6: Final answer
    x = 12,337.39

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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.