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Finding the Fourth Proportional to 8,991.76, 12,394.20 and 5,448.28

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Solution

The fourth proportional to 8,991.76, 12,394.20 and 5,448.28 is: 7,509.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.76 : 12,394.20 = 5,448.28 : x
  2. Step 2: Convert to fraction form
    8,991.76/12,394.20 = 5,448.28/x
  3. Step 3: Cross multiply
    8,991.76x = 12,394.20 × 5,448.28
  4. Step 4: Simplify right side
    8,991.76x = 67,527,071.98
  5. Step 5: Solve for x
    x = 67,527,071.98/8,991.76
  6. Step 6: Final answer
    x = 7,509.88

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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.