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Finding the Fourth Proportional to 10,338.78, 15,494.07 and 6,639.06

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Solution

The fourth proportional to 10,338.78, 15,494.07 and 6,639.06 is: 9,949.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,338.78 : 15,494.07 = 6,639.06 : x
  2. Step 2: Convert to fraction form
    10,338.78/15,494.07 = 6,639.06/x
  3. Step 3: Cross multiply
    10,338.78x = 15,494.07 × 6,639.06
  4. Step 4: Simplify right side
    10,338.78x = 102,866,060.37
  5. Step 5: Solve for x
    x = 102,866,060.37/10,338.78
  6. Step 6: Final answer
    x = 9,949.54

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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.