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Finding the Fourth Proportional to 28,991.76, 43,487.64 and 7,103.76

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Solution

The fourth proportional to 28,991.76, 43,487.64 and 7,103.76 is: 10,655.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.76 : 43,487.64 = 7,103.76 : x
  2. Step 2: Convert to fraction form
    28,991.76/43,487.64 = 7,103.76/x
  3. Step 3: Cross multiply
    28,991.76x = 43,487.64 × 7,103.76
  4. Step 4: Simplify right side
    28,991.76x = 308,925,757.53
  5. Step 5: Solve for x
    x = 308,925,757.53/28,991.76
  6. Step 6: Final answer
    x = 10,655.64

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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.