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Finding the Fourth Proportional to 7,965.61, 10,991.94 and 4,428.52

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Solution

The fourth proportional to 7,965.61, 10,991.94 and 4,428.52 is: 6,111.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.61 : 10,991.94 = 4,428.52 : x
  2. Step 2: Convert to fraction form
    7,965.61/10,991.94 = 4,428.52/x
  3. Step 3: Cross multiply
    7,965.61x = 10,991.94 × 4,428.52
  4. Step 4: Simplify right side
    7,965.61x = 48,678,026.13
  5. Step 5: Solve for x
    x = 48,678,026.13/7,965.61
  6. Step 6: Final answer
    x = 6,111.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.