Home / 21,738.70-29,995.45-12,787.98

Finding the Fourth Proportional to 21,738.70, 29,995.45 and 12,787.98

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Solution

The fourth proportional to 21,738.70, 29,995.45 and 12,787.98 is: 17,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.70 : 29,995.45 = 12,787.98 : x
  2. Step 2: Convert to fraction form
    21,738.70/29,995.45 = 12,787.98/x
  3. Step 3: Cross multiply
    21,738.70x = 29,995.45 × 12,787.98
  4. Step 4: Simplify right side
    21,738.70x = 383,581,214.69
  5. Step 5: Solve for x
    x = 383,581,214.69/21,738.70
  6. Step 6: Final answer
    x = 17,645.09

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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.