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Finding the Fourth Proportional to 18,971.61, 28,452.02 and 5,644.07

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Solution

The fourth proportional to 18,971.61, 28,452.02 and 5,644.07 is: 8,464.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.61 : 28,452.02 = 5,644.07 : x
  2. Step 2: Convert to fraction form
    18,971.61/28,452.02 = 5,644.07/x
  3. Step 3: Cross multiply
    18,971.61x = 28,452.02 × 5,644.07
  4. Step 4: Simplify right side
    18,971.61x = 160,585,022.04
  5. Step 5: Solve for x
    x = 160,585,022.04/18,971.61
  6. Step 6: Final answer
    x = 8,464.49

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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.