Home / 21,293.59-31,946.15-8,146.39

Finding the Fourth Proportional to 21,293.59, 31,946.15 and 8,146.39

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Solution

The fourth proportional to 21,293.59, 31,946.15 and 8,146.39 is: 12,221.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.59 : 31,946.15 = 8,146.39 : x
  2. Step 2: Convert to fraction form
    21,293.59/31,946.15 = 8,146.39/x
  3. Step 3: Cross multiply
    21,293.59x = 31,946.15 × 8,146.39
  4. Step 4: Simplify right side
    21,293.59x = 260,245,796.90
  5. Step 5: Solve for x
    x = 260,245,796.90/21,293.59
  6. Step 6: Final answer
    x = 12,221.79

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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.