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Finding the Fourth Proportional to 18,939, 28,403.06 and 5,788.28

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Solution

The fourth proportional to 18,939, 28,403.06 and 5,788.28 is: 8,680.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939 : 28,403.06 = 5,788.28 : x
  2. Step 2: Convert to fraction form
    18,939/28,403.06 = 5,788.28/x
  3. Step 3: Cross multiply
    18,939x = 28,403.06 × 5,788.28
  4. Step 4: Simplify right side
    18,939x = 164,404,864.14
  5. Step 5: Solve for x
    x = 164,404,864.14/18,939
  6. Step 6: Final answer
    x = 8,680.76

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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.