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Finding the Fourth Proportional to 12,539.68, 18,785.12 and 6,976.16

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Solution

The fourth proportional to 12,539.68, 18,785.12 and 6,976.16 is: 10,450.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.68 : 18,785.12 = 6,976.16 : x
  2. Step 2: Convert to fraction form
    12,539.68/18,785.12 = 6,976.16/x
  3. Step 3: Cross multiply
    12,539.68x = 18,785.12 × 6,976.16
  4. Step 4: Simplify right side
    12,539.68x = 131,047,944.38
  5. Step 5: Solve for x
    x = 131,047,944.38/12,539.68
  6. Step 6: Final answer
    x = 10,450.66

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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.