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Finding the Fourth Proportional to 18,310.81, 27,459.72 and 7,916.89

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Solution

The fourth proportional to 18,310.81, 27,459.72 and 7,916.89 is: 11,872.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,310.81 : 27,459.72 = 7,916.89 : x
  2. Step 2: Convert to fraction form
    18,310.81/27,459.72 = 7,916.89/x
  3. Step 3: Cross multiply
    18,310.81x = 27,459.72 × 7,916.89
  4. Step 4: Simplify right side
    18,310.81x = 217,395,582.67
  5. Step 5: Solve for x
    x = 217,395,582.67/18,310.81
  6. Step 6: Final answer
    x = 11,872.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.