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Finding the Fourth Proportional to 18,934.88, 28,406.42 and 7,248.09

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Solution

The fourth proportional to 18,934.88, 28,406.42 and 7,248.09 is: 10,873.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.88 : 28,406.42 = 7,248.09 : x
  2. Step 2: Convert to fraction form
    18,934.88/28,406.42 = 7,248.09/x
  3. Step 3: Cross multiply
    18,934.88x = 28,406.42 × 7,248.09
  4. Step 4: Simplify right side
    18,934.88x = 205,892,386.20
  5. Step 5: Solve for x
    x = 205,892,386.20/18,934.88
  6. Step 6: Final answer
    x = 10,873.71

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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.