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Finding the Fourth Proportional to 8,986.85, 12,401.90 and 5,212.25

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Solution

The fourth proportional to 8,986.85, 12,401.90 and 5,212.25 is: 7,192.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.85 : 12,401.90 = 5,212.25 : x
  2. Step 2: Convert to fraction form
    8,986.85/12,401.90 = 5,212.25/x
  3. Step 3: Cross multiply
    8,986.85x = 12,401.90 × 5,212.25
  4. Step 4: Simplify right side
    8,986.85x = 64,641,803.28
  5. Step 5: Solve for x
    x = 64,641,803.28/8,986.85
  6. Step 6: Final answer
    x = 7,192.94

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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.