Home / 21,102.68-29,120.80-12,150.52

Finding the Fourth Proportional to 21,102.68, 29,120.80 and 12,150.52

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Solution

The fourth proportional to 21,102.68, 29,120.80 and 12,150.52 is: 16,767.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.68 : 29,120.80 = 12,150.52 : x
  2. Step 2: Convert to fraction form
    21,102.68/29,120.80 = 12,150.52/x
  3. Step 3: Cross multiply
    21,102.68x = 29,120.80 × 12,150.52
  4. Step 4: Simplify right side
    21,102.68x = 353,832,862.82
  5. Step 5: Solve for x
    x = 353,832,862.82/21,102.68
  6. Step 6: Final answer
    x = 16,767.20

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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.