Home / 21,621.51-29,845.17-12,671.91

Finding the Fourth Proportional to 21,621.51, 29,845.17 and 12,671.91

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Solution

The fourth proportional to 21,621.51, 29,845.17 and 12,671.91 is: 17,491.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.51 : 29,845.17 = 12,671.91 : x
  2. Step 2: Convert to fraction form
    21,621.51/29,845.17 = 12,671.91/x
  3. Step 3: Cross multiply
    21,621.51x = 29,845.17 × 12,671.91
  4. Step 4: Simplify right side
    21,621.51x = 378,195,308.17
  5. Step 5: Solve for x
    x = 378,195,308.17/21,621.51
  6. Step 6: Final answer
    x = 17,491.62

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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.