Home / 22,680.64-31,299.96-13,729.78

Finding the Fourth Proportional to 22,680.64, 31,299.96 and 13,729.78

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Solution

The fourth proportional to 22,680.64, 31,299.96 and 13,729.78 is: 18,947.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,680.64 : 31,299.96 = 13,729.78 : x
  2. Step 2: Convert to fraction form
    22,680.64/31,299.96 = 13,729.78/x
  3. Step 3: Cross multiply
    22,680.64x = 31,299.96 × 13,729.78
  4. Step 4: Simplify right side
    22,680.64x = 429,741,564.81
  5. Step 5: Solve for x
    x = 429,741,564.81/22,680.64
  6. Step 6: Final answer
    x = 18,947.51

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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.