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Finding the Fourth Proportional to 8,991.87, 12,402.12 and 5,961.51

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Solution

The fourth proportional to 8,991.87, 12,402.12 and 5,961.51 is: 8,222.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.87 : 12,402.12 = 5,961.51 : x
  2. Step 2: Convert to fraction form
    8,991.87/12,402.12 = 5,961.51/x
  3. Step 3: Cross multiply
    8,991.87x = 12,402.12 × 5,961.51
  4. Step 4: Simplify right side
    8,991.87x = 73,935,362.40
  5. Step 5: Solve for x
    x = 73,935,362.40/8,991.87
  6. Step 6: Final answer
    x = 8,222.47

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1.5x scale

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.