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Finding the Fourth Proportional to 18,715, 25,826.75 and 10,331.50

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Solution

The fourth proportional to 18,715, 25,826.75 and 10,331.50 is: 14,257.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715 : 25,826.75 = 10,331.50 : x
  2. Step 2: Convert to fraction form
    18,715/25,826.75 = 10,331.50/x
  3. Step 3: Cross multiply
    18,715x = 25,826.75 × 10,331.50
  4. Step 4: Simplify right side
    18,715x = 266,829,067.63
  5. Step 5: Solve for x
    x = 266,829,067.63/18,715
  6. Step 6: Final answer
    x = 14,257.50

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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.