Home / 21,110.16-29,131.20-11,678.52

Finding the Fourth Proportional to 21,110.16, 29,131.20 and 11,678.52

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Solution

The fourth proportional to 21,110.16, 29,131.20 and 11,678.52 is: 16,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.16 : 29,131.20 = 11,678.52 : x
  2. Step 2: Convert to fraction form
    21,110.16/29,131.20 = 11,678.52/x
  3. Step 3: Cross multiply
    21,110.16x = 29,131.20 × 11,678.52
  4. Step 4: Simplify right side
    21,110.16x = 340,209,301.82
  5. Step 5: Solve for x
    x = 340,209,301.82/21,110.16
  6. Step 6: Final answer
    x = 16,115.90

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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.