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Finding the Fourth Proportional to 28,919.70, 43,379.55 and 17,838.90

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Solution

The fourth proportional to 28,919.70, 43,379.55 and 17,838.90 is: 26,758.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.70 : 43,379.55 = 17,838.90 : x
  2. Step 2: Convert to fraction form
    28,919.70/43,379.55 = 17,838.90/x
  3. Step 3: Cross multiply
    28,919.70x = 43,379.55 × 17,838.90
  4. Step 4: Simplify right side
    28,919.70x = 773,843,454.50
  5. Step 5: Solve for x
    x = 773,843,454.50/28,919.70
  6. Step 6: Final answer
    x = 26,758.35

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Similar ratio
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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.