Home / 21,130.14-29,151.99-12,743.58

Finding the Fourth Proportional to 21,130.14, 29,151.99 and 12,743.58

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Solution

The fourth proportional to 21,130.14, 29,151.99 and 12,743.58 is: 17,581.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.14 : 29,151.99 = 12,743.58 : x
  2. Step 2: Convert to fraction form
    21,130.14/29,151.99 = 12,743.58/x
  3. Step 3: Cross multiply
    21,130.14x = 29,151.99 × 12,743.58
  4. Step 4: Simplify right side
    21,130.14x = 371,500,716.72
  5. Step 5: Solve for x
    x = 371,500,716.72/21,130.14
  6. Step 6: Final answer
    x = 17,581.55

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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.