Home / 21,026.20-31,512.04-8,531.68

Finding the Fourth Proportional to 21,026.20, 31,512.04 and 8,531.68

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Solution

The fourth proportional to 21,026.20, 31,512.04 and 8,531.68 is: 12,786.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,026.20 : 31,512.04 = 8,531.68 : x
  2. Step 2: Convert to fraction form
    21,026.20/31,512.04 = 8,531.68/x
  3. Step 3: Cross multiply
    21,026.20x = 31,512.04 × 8,531.68
  4. Step 4: Simplify right side
    21,026.20x = 268,850,641.43
  5. Step 5: Solve for x
    x = 268,850,641.43/21,026.20
  6. Step 6: Final answer
    x = 12,786.46

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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.