Home / 21,892.19-30,211.96-12,947.36

Finding the Fourth Proportional to 21,892.19, 30,211.96 and 12,947.36

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Solution

The fourth proportional to 21,892.19, 30,211.96 and 12,947.36 is: 17,867.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,892.19 : 30,211.96 = 12,947.36 : x
  2. Step 2: Convert to fraction form
    21,892.19/30,211.96 = 12,947.36/x
  3. Step 3: Cross multiply
    21,892.19x = 30,211.96 × 12,947.36
  4. Step 4: Simplify right side
    21,892.19x = 391,164,939.00
  5. Step 5: Solve for x
    x = 391,164,939.00/21,892.19
  6. Step 6: Final answer
    x = 17,867.79

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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.