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Finding the Fourth Proportional to 28,999.70, 43,499.55 and 27,638.90

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Solution

The fourth proportional to 28,999.70, 43,499.55 and 27,638.90 is: 41,458.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,999.70 : 43,499.55 = 27,638.90 : x
  2. Step 2: Convert to fraction form
    28,999.70/43,499.55 = 27,638.90/x
  3. Step 3: Cross multiply
    28,999.70x = 43,499.55 × 27,638.90
  4. Step 4: Simplify right side
    28,999.70x = 1,202,279,712.50
  5. Step 5: Solve for x
    x = 1,202,279,712.50/28,999.70
  6. Step 6: Final answer
    x = 41,458.35

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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.