Home / 21,085.88-29,107.96-13,432.44

Finding the Fourth Proportional to 21,085.88, 29,107.96 and 13,432.44

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Solution

The fourth proportional to 21,085.88, 29,107.96 and 13,432.44 is: 18,542.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.88 : 29,107.96 = 13,432.44 : x
  2. Step 2: Convert to fraction form
    21,085.88/29,107.96 = 13,432.44/x
  3. Step 3: Cross multiply
    21,085.88x = 29,107.96 × 13,432.44
  4. Step 4: Simplify right side
    21,085.88x = 390,990,926.22
  5. Step 5: Solve for x
    x = 390,990,926.22/21,085.88
  6. Step 6: Final answer
    x = 18,542.78

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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.