Home / 21,103.65-29,108.97-15,351.57

Finding the Fourth Proportional to 21,103.65, 29,108.97 and 15,351.57

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Solution

The fourth proportional to 21,103.65, 29,108.97 and 15,351.57 is: 21,174.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.65 : 29,108.97 = 15,351.57 : x
  2. Step 2: Convert to fraction form
    21,103.65/29,108.97 = 15,351.57/x
  3. Step 3: Cross multiply
    21,103.65x = 29,108.97 × 15,351.57
  4. Step 4: Simplify right side
    21,103.65x = 446,868,390.58
  5. Step 5: Solve for x
    x = 446,868,390.58/21,103.65
  6. Step 6: Final answer
    x = 21,174.93

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1.5x scale

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.