Home / 21,627.76-29,836.20-13,681.68

Finding the Fourth Proportional to 21,627.76, 29,836.20 and 13,681.68

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Solution

The fourth proportional to 21,627.76, 29,836.20 and 13,681.68 is: 18,874.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,627.76 : 29,836.20 = 13,681.68 : x
  2. Step 2: Convert to fraction form
    21,627.76/29,836.20 = 13,681.68/x
  3. Step 3: Cross multiply
    21,627.76x = 29,836.20 × 13,681.68
  4. Step 4: Simplify right side
    21,627.76x = 408,209,340.82
  5. Step 5: Solve for x
    x = 408,209,340.82/21,627.76
  6. Step 6: Final answer
    x = 18,874.32

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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.