Home / 21,874.85-30,186.63-12,315.27

Finding the Fourth Proportional to 21,874.85, 30,186.63 and 12,315.27

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Solution

The fourth proportional to 21,874.85, 30,186.63 and 12,315.27 is: 16,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,874.85 : 30,186.63 = 12,315.27 : x
  2. Step 2: Convert to fraction form
    21,874.85/30,186.63 = 12,315.27/x
  3. Step 3: Cross multiply
    21,874.85x = 30,186.63 × 12,315.27
  4. Step 4: Simplify right side
    21,874.85x = 371,756,498.84
  5. Step 5: Solve for x
    x = 371,756,498.84/21,874.85
  6. Step 6: Final answer
    x = 16,994.70

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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.