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Finding the Fourth Proportional to 18,936.32, 28,404.54 and 5,788.65

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Solution

The fourth proportional to 18,936.32, 28,404.54 and 5,788.65 is: 8,683.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.32 : 28,404.54 = 5,788.65 : x
  2. Step 2: Convert to fraction form
    18,936.32/28,404.54 = 5,788.65/x
  3. Step 3: Cross multiply
    18,936.32x = 28,404.54 × 5,788.65
  4. Step 4: Simplify right side
    18,936.32x = 164,423,940.47
  5. Step 5: Solve for x
    x = 164,423,940.47/18,936.32
  6. Step 6: Final answer
    x = 8,683.00

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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.