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Finding the Fourth Proportional to 8,985.66, 12,401.67 and 6,857.16

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Solution

The fourth proportional to 8,985.66, 12,401.67 and 6,857.16 is: 9,463.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.66 : 12,401.67 = 6,857.16 : x
  2. Step 2: Convert to fraction form
    8,985.66/12,401.67 = 6,857.16/x
  3. Step 3: Cross multiply
    8,985.66x = 12,401.67 × 6,857.16
  4. Step 4: Simplify right side
    8,985.66x = 85,040,235.46
  5. Step 5: Solve for x
    x = 85,040,235.46/8,985.66
  6. Step 6: Final answer
    x = 9,463.99

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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.