Home / 21,521.74-29,699.30-11,961.58

Finding the Fourth Proportional to 21,521.74, 29,699.30 and 11,961.58

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Solution

The fourth proportional to 21,521.74, 29,699.30 and 11,961.58 is: 16,506.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.74 : 29,699.30 = 11,961.58 : x
  2. Step 2: Convert to fraction form
    21,521.74/29,699.30 = 11,961.58/x
  3. Step 3: Cross multiply
    21,521.74x = 29,699.30 × 11,961.58
  4. Step 4: Simplify right side
    21,521.74x = 355,250,552.89
  5. Step 5: Solve for x
    x = 355,250,552.89/21,521.74
  6. Step 6: Final answer
    x = 16,506.59

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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.