Home / 21,278.86-29,363.49-12,775.96

Finding the Fourth Proportional to 21,278.86, 29,363.49 and 12,775.96

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Solution

The fourth proportional to 21,278.86, 29,363.49 and 12,775.96 is: 17,630.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.86 : 29,363.49 = 12,775.96 : x
  2. Step 2: Convert to fraction form
    21,278.86/29,363.49 = 12,775.96/x
  3. Step 3: Cross multiply
    21,278.86x = 29,363.49 × 12,775.96
  4. Step 4: Simplify right side
    21,278.86x = 375,146,773.70
  5. Step 5: Solve for x
    x = 375,146,773.70/21,278.86
  6. Step 6: Final answer
    x = 17,630.02

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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.