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Finding the Fourth Proportional to 10,502.70, 15,756.78 and 3,929.39

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Solution

The fourth proportional to 10,502.70, 15,756.78 and 3,929.39 is: 5,895.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,502.70 : 15,756.78 = 3,929.39 : x
  2. Step 2: Convert to fraction form
    10,502.70/15,756.78 = 3,929.39/x
  3. Step 3: Cross multiply
    10,502.70x = 15,756.78 × 3,929.39
  4. Step 4: Simplify right side
    10,502.70x = 61,914,595.33
  5. Step 5: Solve for x
    x = 61,914,595.33/10,502.70
  6. Step 6: Final answer
    x = 5,895.11

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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.