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Finding the Fourth Proportional to 8,986.81, 12,401.76 and 5,212.16

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Solution

The fourth proportional to 8,986.81, 12,401.76 and 5,212.16 is: 7,192.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.81 : 12,401.76 = 5,212.16 : x
  2. Step 2: Convert to fraction form
    8,986.81/12,401.76 = 5,212.16/x
  3. Step 3: Cross multiply
    8,986.81x = 12,401.76 × 5,212.16
  4. Step 4: Simplify right side
    8,986.81x = 64,639,957.40
  5. Step 5: Solve for x
    x = 64,639,957.40/8,986.81
  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.