Home / 21,719.71-29,972.97-12,159.69

Finding the Fourth Proportional to 21,719.71, 29,972.97 and 12,159.69

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Solution

The fourth proportional to 21,719.71, 29,972.97 and 12,159.69 is: 16,780.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.71 : 29,972.97 = 12,159.69 : x
  2. Step 2: Convert to fraction form
    21,719.71/29,972.97 = 12,159.69/x
  3. Step 3: Cross multiply
    21,719.71x = 29,972.97 × 12,159.69
  4. Step 4: Simplify right side
    21,719.71x = 364,461,911.18
  5. Step 5: Solve for x
    x = 364,461,911.18/21,719.71
  6. Step 6: Final answer
    x = 16,780.24

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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.