Home / 21,290.52-31,935.78-8,146.92

Finding the Fourth Proportional to 21,290.52, 31,935.78 and 8,146.92

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Solution

The fourth proportional to 21,290.52, 31,935.78 and 8,146.92 is: 12,220.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.52 : 31,935.78 = 8,146.92 : x
  2. Step 2: Convert to fraction form
    21,290.52/31,935.78 = 8,146.92/x
  3. Step 3: Cross multiply
    21,290.52x = 31,935.78 × 8,146.92
  4. Step 4: Simplify right side
    21,290.52x = 260,178,244.80
  5. Step 5: Solve for x
    x = 260,178,244.80/21,290.52
  6. Step 6: Final answer
    x = 12,220.38

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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.