Home / 21,107.28-31,592.24-15,558.40

Finding the Fourth Proportional to 21,107.28, 31,592.24 and 15,558.40

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Solution

The fourth proportional to 21,107.28, 31,592.24 and 15,558.40 is: 23,286.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.28 : 31,592.24 = 15,558.40 : x
  2. Step 2: Convert to fraction form
    21,107.28/31,592.24 = 15,558.40/x
  3. Step 3: Cross multiply
    21,107.28x = 31,592.24 × 15,558.40
  4. Step 4: Simplify right side
    21,107.28x = 491,524,706.82
  5. Step 5: Solve for x
    x = 491,524,706.82/21,107.28
  6. Step 6: Final answer
    x = 23,286.98

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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.