Home / 21,017.26-29,005.59-11,587.78

Finding the Fourth Proportional to 21,017.26, 29,005.59 and 11,587.78

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Solution

The fourth proportional to 21,017.26, 29,005.59 and 11,587.78 is: 15,992.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.26 : 29,005.59 = 11,587.78 : x
  2. Step 2: Convert to fraction form
    21,017.26/29,005.59 = 11,587.78/x
  3. Step 3: Cross multiply
    21,017.26x = 29,005.59 × 11,587.78
  4. Step 4: Simplify right side
    21,017.26x = 336,110,395.69
  5. Step 5: Solve for x
    x = 336,110,395.69/21,017.26
  6. Step 6: Final answer
    x = 15,992.11

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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.