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Finding the Fourth Proportional to 8,991.80, 13,484.28 and 2,749.91

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Solution

The fourth proportional to 8,991.80, 13,484.28 and 2,749.91 is: 4,123.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.80 : 13,484.28 = 2,749.91 : x
  2. Step 2: Convert to fraction form
    8,991.80/13,484.28 = 2,749.91/x
  3. Step 3: Cross multiply
    8,991.80x = 13,484.28 × 2,749.91
  4. Step 4: Simplify right side
    8,991.80x = 37,080,556.41
  5. Step 5: Solve for x
    x = 37,080,556.41/8,991.80
  6. Step 6: Final answer
    x = 4,123.82

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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.