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Finding the Fourth Proportional to 10,916.84, 15,065.36 and 8,529.56

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Solution

The fourth proportional to 10,916.84, 15,065.36 and 8,529.56 is: 11,770.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916.84 : 15,065.36 = 8,529.56 : x
  2. Step 2: Convert to fraction form
    10,916.84/15,065.36 = 8,529.56/x
  3. Step 3: Cross multiply
    10,916.84x = 15,065.36 × 8,529.56
  4. Step 4: Simplify right side
    10,916.84x = 128,500,892.04
  5. Step 5: Solve for x
    x = 128,500,892.04/10,916.84
  6. Step 6: Final answer
    x = 11,770.89

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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.