Home / 21,869.86-30,179.30-12,438.22

Finding the Fourth Proportional to 21,869.86, 30,179.30 and 12,438.22

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Solution

The fourth proportional to 21,869.86, 30,179.30 and 12,438.22 is: 17,164.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.86 : 30,179.30 = 12,438.22 : x
  2. Step 2: Convert to fraction form
    21,869.86/30,179.30 = 12,438.22/x
  3. Step 3: Cross multiply
    21,869.86x = 30,179.30 × 12,438.22
  4. Step 4: Simplify right side
    21,869.86x = 375,376,772.85
  5. Step 5: Solve for x
    x = 375,376,772.85/21,869.86
  6. Step 6: Final answer
    x = 17,164.11

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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.