Home / 21,112.70-31,641.35-11,747.88

Finding the Fourth Proportional to 21,112.70, 31,641.35 and 11,747.88

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Solution

The fourth proportional to 21,112.70, 31,641.35 and 11,747.88 is: 17,606.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.70 : 31,641.35 = 11,747.88 : x
  2. Step 2: Convert to fraction form
    21,112.70/31,641.35 = 11,747.88/x
  3. Step 3: Cross multiply
    21,112.70x = 31,641.35 × 11,747.88
  4. Step 4: Simplify right side
    21,112.70x = 371,718,724.10
  5. Step 5: Solve for x
    x = 371,718,724.10/21,112.70
  6. Step 6: Final answer
    x = 17,606.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.