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Finding the Fourth Proportional to 28,149.74, 38,829.72 and 18,589.72

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Solution

The fourth proportional to 28,149.74, 38,829.72 and 18,589.72 is: 25,642.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149.74 : 38,829.72 = 18,589.72 : x
  2. Step 2: Convert to fraction form
    28,149.74/38,829.72 = 18,589.72/x
  3. Step 3: Cross multiply
    28,149.74x = 38,829.72 × 18,589.72
  4. Step 4: Simplify right side
    28,149.74x = 721,833,595.12
  5. Step 5: Solve for x
    x = 721,833,595.12/28,149.74
  6. Step 6: Final answer
    x = 25,642.64

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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.