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Finding the Fourth Proportional to 8,991.21, 12,407.22 and 5,012.54

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Solution

The fourth proportional to 8,991.21, 12,407.22 and 5,012.54 is: 6,916.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.21 : 12,407.22 = 5,012.54 : x
  2. Step 2: Convert to fraction form
    8,991.21/12,407.22 = 5,012.54/x
  3. Step 3: Cross multiply
    8,991.21x = 12,407.22 × 5,012.54
  4. Step 4: Simplify right side
    8,991.21x = 62,191,624.50
  5. Step 5: Solve for x
    x = 62,191,624.50/8,991.21
  6. Step 6: Final answer
    x = 6,916.94

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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.