Home / 21,085.11-29,096.64-12,588.66

Finding the Fourth Proportional to 21,085.11, 29,096.64 and 12,588.66

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Solution

The fourth proportional to 21,085.11, 29,096.64 and 12,588.66 is: 17,371.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.11 : 29,096.64 = 12,588.66 : x
  2. Step 2: Convert to fraction form
    21,085.11/29,096.64 = 12,588.66/x
  3. Step 3: Cross multiply
    21,085.11x = 29,096.64 × 12,588.66
  4. Step 4: Simplify right side
    21,085.11x = 366,287,708.10
  5. Step 5: Solve for x
    x = 366,287,708.10/21,085.11
  6. Step 6: Final answer
    x = 17,371.87

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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.