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Finding the Fourth Proportional to 8,986.72, 12,401.73 and 5,212.13

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Solution

The fourth proportional to 8,986.72, 12,401.73 and 5,212.13 is: 7,192.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.72 : 12,401.73 = 5,212.13 : x
  2. Step 2: Convert to fraction form
    8,986.72/12,401.73 = 5,212.13/x
  3. Step 3: Cross multiply
    8,986.72x = 12,401.73 × 5,212.13
  4. Step 4: Simplify right side
    8,986.72x = 64,639,353.95
  5. Step 5: Solve for x
    x = 64,639,353.95/8,986.72
  6. Step 6: Final answer
    x = 7,192.76

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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.