Home / 21,283.32-29,344.97-13,311.71

Finding the Fourth Proportional to 21,283.32, 29,344.97 and 13,311.71

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Solution

The fourth proportional to 21,283.32, 29,344.97 and 13,311.71 is: 18,353.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.32 : 29,344.97 = 13,311.71 : x
  2. Step 2: Convert to fraction form
    21,283.32/29,344.97 = 13,311.71/x
  3. Step 3: Cross multiply
    21,283.32x = 29,344.97 × 13,311.71
  4. Step 4: Simplify right side
    21,283.32x = 390,631,517.32
  5. Step 5: Solve for x
    x = 390,631,517.32/21,283.32
  6. Step 6: Final answer
    x = 18,353.88

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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.