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Finding the Fourth Proportional to 18,782.52, 25,920.17 and 10,284.50

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Solution

The fourth proportional to 18,782.52, 25,920.17 and 10,284.50 is: 14,192.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.52 : 25,920.17 = 10,284.50 : x
  2. Step 2: Convert to fraction form
    18,782.52/25,920.17 = 10,284.50/x
  3. Step 3: Cross multiply
    18,782.52x = 25,920.17 × 10,284.50
  4. Step 4: Simplify right side
    18,782.52x = 266,576,040.31
  5. Step 5: Solve for x
    x = 266,576,040.31/18,782.52
  6. Step 6: Final answer
    x = 14,192.78

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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.