Home / 21,253.12-31,854.90-18,792.74

Finding the Fourth Proportional to 21,253.12, 31,854.90 and 18,792.74

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Solution

The fourth proportional to 21,253.12, 31,854.90 and 18,792.74 is: 28,167.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.12 : 31,854.90 = 18,792.74 : x
  2. Step 2: Convert to fraction form
    21,253.12/31,854.90 = 18,792.74/x
  3. Step 3: Cross multiply
    21,253.12x = 31,854.90 × 18,792.74
  4. Step 4: Simplify right side
    21,253.12x = 598,641,003.54
  5. Step 5: Solve for x
    x = 598,641,003.54/21,253.12
  6. Step 6: Final answer
    x = 28,167.21

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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.