Home / 18,988.20-26,203.43-10,921.61

Finding the Fourth Proportional to 18,988.20, 26,203.43 and 10,921.61

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Solution

The fourth proportional to 18,988.20, 26,203.43 and 10,921.61 is: 15,071.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.20 : 26,203.43 = 10,921.61 : x
  2. Step 2: Convert to fraction form
    18,988.20/26,203.43 = 10,921.61/x
  3. Step 3: Cross multiply
    18,988.20x = 26,203.43 × 10,921.61
  4. Step 4: Simplify right side
    18,988.20x = 286,183,735.93
  5. Step 5: Solve for x
    x = 286,183,735.93/18,988.20
  6. Step 6: Final answer
    x = 15,071.66

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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.