Home / 21,408.39-29,539.16-14,691.57

Finding the Fourth Proportional to 21,408.39, 29,539.16 and 14,691.57

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Solution

The fourth proportional to 21,408.39, 29,539.16 and 14,691.57 is: 20,271.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.39 : 29,539.16 = 14,691.57 : x
  2. Step 2: Convert to fraction form
    21,408.39/29,539.16 = 14,691.57/x
  3. Step 3: Cross multiply
    21,408.39x = 29,539.16 × 14,691.57
  4. Step 4: Simplify right side
    21,408.39x = 433,976,563.42
  5. Step 5: Solve for x
    x = 433,976,563.42/21,408.39
  6. Step 6: Final answer
    x = 20,271.33

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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.