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Finding the Fourth Proportional to 8,991.44, 12,407.24 and 5,011.80

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Solution

The fourth proportional to 8,991.44, 12,407.24 and 5,011.80 is: 6,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.44 : 12,407.24 = 5,011.80 : x
  2. Step 2: Convert to fraction form
    8,991.44/12,407.24 = 5,011.80/x
  3. Step 3: Cross multiply
    8,991.44x = 12,407.24 × 5,011.80
  4. Step 4: Simplify right side
    8,991.44x = 62,182,605.43
  5. Step 5: Solve for x
    x = 62,182,605.43/8,991.44
  6. Step 6: Final answer
    x = 6,915.76

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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.