Home / 21,874.66-30,186.34-12,315.11

Finding the Fourth Proportional to 21,874.66, 30,186.34 and 12,315.11

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Solution

The fourth proportional to 21,874.66, 30,186.34 and 12,315.11 is: 16,994.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,874.66 : 30,186.34 = 12,315.11 : x
  2. Step 2: Convert to fraction form
    21,874.66/30,186.34 = 12,315.11/x
  3. Step 3: Cross multiply
    21,874.66x = 30,186.34 × 12,315.11
  4. Step 4: Simplify right side
    21,874.66x = 371,747,915.88
  5. Step 5: Solve for x
    x = 371,747,915.88/21,874.66
  6. Step 6: Final answer
    x = 16,994.46

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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.