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Finding the Fourth Proportional to 28,891.96, 43,343.32 and 9,165.20

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Solution

The fourth proportional to 28,891.96, 43,343.32 and 9,165.20 is: 13,749.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,891.96 : 43,343.32 = 9,165.20 : x
  2. Step 2: Convert to fraction form
    28,891.96/43,343.32 = 9,165.20/x
  3. Step 3: Cross multiply
    28,891.96x = 43,343.32 × 9,165.20
  4. Step 4: Simplify right side
    28,891.96x = 397,250,196.46
  5. Step 5: Solve for x
    x = 397,250,196.46/28,891.96
  6. Step 6: Final answer
    x = 13,749.51

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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.