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Finding the Fourth Proportional to 10,857.87, 14,981.22 and 6,381.81

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Solution

The fourth proportional to 10,857.87, 14,981.22 and 6,381.81 is: 8,805.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,857.87 : 14,981.22 = 6,381.81 : x
  2. Step 2: Convert to fraction form
    10,857.87/14,981.22 = 6,381.81/x
  3. Step 3: Cross multiply
    10,857.87x = 14,981.22 × 6,381.81
  4. Step 4: Simplify right side
    10,857.87x = 95,607,299.61
  5. Step 5: Solve for x
    x = 95,607,299.61/10,857.87
  6. Step 6: Final answer
    x = 8,805.35

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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.