Home / 21,876.08-30,189.20-12,445.28

Finding the Fourth Proportional to 21,876.08, 30,189.20 and 12,445.28

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Solution

The fourth proportional to 21,876.08, 30,189.20 and 12,445.28 is: 17,174.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,876.08 : 30,189.20 = 12,445.28 : x
  2. Step 2: Convert to fraction form
    21,876.08/30,189.20 = 12,445.28/x
  3. Step 3: Cross multiply
    21,876.08x = 30,189.20 × 12,445.28
  4. Step 4: Simplify right side
    21,876.08x = 375,713,046.98
  5. Step 5: Solve for x
    x = 375,713,046.98/21,876.08
  6. Step 6: Final answer
    x = 17,174.61

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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.