Home / 21,263.78-31,901.92-8,784.52

Finding the Fourth Proportional to 21,263.78, 31,901.92 and 8,784.52

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Solution

The fourth proportional to 21,263.78, 31,901.92 and 8,784.52 is: 13,179.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,263.78 : 31,901.92 = 8,784.52 : x
  2. Step 2: Convert to fraction form
    21,263.78/31,901.92 = 8,784.52/x
  3. Step 3: Cross multiply
    21,263.78x = 31,901.92 × 8,784.52
  4. Step 4: Simplify right side
    21,263.78x = 280,242,952.56
  5. Step 5: Solve for x
    x = 280,242,952.56/21,263.78
  6. Step 6: Final answer
    x = 13,179.36

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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.