Home / 21,275.87-31,926.56-8,129.26

Finding the Fourth Proportional to 21,275.87, 31,926.56 and 8,129.26

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Solution

The fourth proportional to 21,275.87, 31,926.56 and 8,129.26 is: 12,198.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.87 : 31,926.56 = 8,129.26 : x
  2. Step 2: Convert to fraction form
    21,275.87/31,926.56 = 8,129.26/x
  3. Step 3: Cross multiply
    21,275.87x = 31,926.56 × 8,129.26
  4. Step 4: Simplify right side
    21,275.87x = 259,539,306.41
  5. Step 5: Solve for x
    x = 259,539,306.41/21,275.87
  6. Step 6: Final answer
    x = 12,198.77

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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.