Home / 15,865.59-21,893.31-8,791.86

Finding the Fourth Proportional to 15,865.59, 21,893.31 and 8,791.86

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Solution

The fourth proportional to 15,865.59, 21,893.31 and 8,791.86 is: 12,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.59 : 21,893.31 = 8,791.86 : x
  2. Step 2: Convert to fraction form
    15,865.59/21,893.31 = 8,791.86/x
  3. Step 3: Cross multiply
    15,865.59x = 21,893.31 × 8,791.86
  4. Step 4: Simplify right side
    15,865.59x = 192,482,916.46
  5. Step 5: Solve for x
    x = 192,482,916.46/15,865.59
  6. Step 6: Final answer
    x = 12,132.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.