Home / 21,291.51-31,959.06-17,581.92

Finding the Fourth Proportional to 21,291.51, 31,959.06 and 17,581.92

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Solution

The fourth proportional to 21,291.51, 31,959.06 and 17,581.92 is: 26,390.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.51 : 31,959.06 = 17,581.92 : x
  2. Step 2: Convert to fraction form
    21,291.51/31,959.06 = 17,581.92/x
  3. Step 3: Cross multiply
    21,291.51x = 31,959.06 × 17,581.92
  4. Step 4: Simplify right side
    21,291.51x = 561,901,636.20
  5. Step 5: Solve for x
    x = 561,901,636.20/21,291.51
  6. Step 6: Final answer
    x = 26,390.88

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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.