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Finding the Fourth Proportional to 15,745.64, 21,738.02 and 10,447.64

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Solution

The fourth proportional to 15,745.64, 21,738.02 and 10,447.64 is: 14,423.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.64 : 21,738.02 = 10,447.64 : x
  2. Step 2: Convert to fraction form
    15,745.64/21,738.02 = 10,447.64/x
  3. Step 3: Cross multiply
    15,745.64x = 21,738.02 × 10,447.64
  4. Step 4: Simplify right side
    15,745.64x = 227,111,007.27
  5. Step 5: Solve for x
    x = 227,111,007.27/15,745.64
  6. Step 6: Final answer
    x = 14,423.74

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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.