Home / 21,310.46-29,408.51-12,817.47

Finding the Fourth Proportional to 21,310.46, 29,408.51 and 12,817.47

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Solution

The fourth proportional to 21,310.46, 29,408.51 and 12,817.47 is: 17,688.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.46 : 29,408.51 = 12,817.47 : x
  2. Step 2: Convert to fraction form
    21,310.46/29,408.51 = 12,817.47/x
  3. Step 3: Cross multiply
    21,310.46x = 29,408.51 × 12,817.47
  4. Step 4: Simplify right side
    21,310.46x = 376,942,630.58
  5. Step 5: Solve for x
    x = 376,942,630.58/21,310.46
  6. Step 6: Final answer
    x = 17,688.15

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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.