Home / 21,195.52-31,844.64-18,707.20

Finding the Fourth Proportional to 21,195.52, 31,844.64 and 18,707.20

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Solution

The fourth proportional to 21,195.52, 31,844.64 and 18,707.20 is: 28,106.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.52 : 31,844.64 = 18,707.20 : x
  2. Step 2: Convert to fraction form
    21,195.52/31,844.64 = 18,707.20/x
  3. Step 3: Cross multiply
    21,195.52x = 31,844.64 × 18,707.20
  4. Step 4: Simplify right side
    21,195.52x = 595,724,049.41
  5. Step 5: Solve for x
    x = 595,724,049.41/21,195.52
  6. Step 6: Final answer
    x = 28,106.13

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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.