Home / 21,531.76-29,713.80-11,971.34

Finding the Fourth Proportional to 21,531.76, 29,713.80 and 11,971.34

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Solution

The fourth proportional to 21,531.76, 29,713.80 and 11,971.34 is: 16,520.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.76 : 29,713.80 = 11,971.34 : x
  2. Step 2: Convert to fraction form
    21,531.76/29,713.80 = 11,971.34/x
  3. Step 3: Cross multiply
    21,531.76x = 29,713.80 × 11,971.34
  4. Step 4: Simplify right side
    21,531.76x = 355,714,002.49
  5. Step 5: Solve for x
    x = 355,714,002.49/21,531.76
  6. Step 6: Final answer
    x = 16,520.43

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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.