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Finding the Fourth Proportional to 28,999.76, 43,499.68 and 7,111.76

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Solution

The fourth proportional to 28,999.76, 43,499.68 and 7,111.76 is: 10,667.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,999.76 : 43,499.68 = 7,111.76 : x
  2. Step 2: Convert to fraction form
    28,999.76/43,499.68 = 7,111.76/x
  3. Step 3: Cross multiply
    28,999.76x = 43,499.68 × 7,111.76
  4. Step 4: Simplify right side
    28,999.76x = 309,359,284.24
  5. Step 5: Solve for x
    x = 309,359,284.24/28,999.76
  6. Step 6: Final answer
    x = 10,667.65

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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.