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Finding the Fourth Proportional to 18,139.88, 25,025.88 and 10,478.09

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Solution

The fourth proportional to 18,139.88, 25,025.88 and 10,478.09 is: 14,455.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.88 : 25,025.88 = 10,478.09 : x
  2. Step 2: Convert to fraction form
    18,139.88/25,025.88 = 10,478.09/x
  3. Step 3: Cross multiply
    18,139.88x = 25,025.88 × 10,478.09
  4. Step 4: Simplify right side
    18,139.88x = 262,223,422.97
  5. Step 5: Solve for x
    x = 262,223,422.97/18,139.88
  6. Step 6: Final answer
    x = 14,455.63

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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.