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Finding the Fourth Proportional to 28,690.80, 43,035.84 and 7,914.12

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Solution

The fourth proportional to 28,690.80, 43,035.84 and 7,914.12 is: 11,871.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.80 : 43,035.84 = 7,914.12 : x
  2. Step 2: Convert to fraction form
    28,690.80/43,035.84 = 7,914.12/x
  3. Step 3: Cross multiply
    28,690.80x = 43,035.84 × 7,914.12
  4. Step 4: Simplify right side
    28,690.80x = 340,590,802.06
  5. Step 5: Solve for x
    x = 340,590,802.06/28,690.80
  6. Step 6: Final answer
    x = 11,871.08

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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.