Home / 21,531.19-29,713.13-11,971.95

Finding the Fourth Proportional to 21,531.19, 29,713.13 and 11,971.95

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Solution

The fourth proportional to 21,531.19, 29,713.13 and 11,971.95 is: 16,521.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.19 : 29,713.13 = 11,971.95 : x
  2. Step 2: Convert to fraction form
    21,531.19/29,713.13 = 11,971.95/x
  3. Step 3: Cross multiply
    21,531.19x = 29,713.13 × 11,971.95
  4. Step 4: Simplify right side
    21,531.19x = 355,723,959.42
  5. Step 5: Solve for x
    x = 355,723,959.42/21,531.19
  6. Step 6: Final answer
    x = 16,521.34

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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.