Home / 21,839.66-30,138.82-12,408.74

Finding the Fourth Proportional to 21,839.66, 30,138.82 and 12,408.74

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Solution

The fourth proportional to 21,839.66, 30,138.82 and 12,408.74 is: 17,124.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.66 : 30,138.82 = 12,408.74 : x
  2. Step 2: Convert to fraction form
    21,839.66/30,138.82 = 12,408.74/x
  3. Step 3: Cross multiply
    21,839.66x = 30,138.82 × 12,408.74
  4. Step 4: Simplify right side
    21,839.66x = 373,984,781.29
  5. Step 5: Solve for x
    x = 373,984,781.29/21,839.66
  6. Step 6: Final answer
    x = 17,124.11

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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.