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Finding the Fourth Proportional to 9,400.65, 12,972.87 and 5,208.90

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Solution

The fourth proportional to 9,400.65, 12,972.87 and 5,208.90 is: 7,188.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,400.65 : 12,972.87 = 5,208.90 : x
  2. Step 2: Convert to fraction form
    9,400.65/12,972.87 = 5,208.90/x
  3. Step 3: Cross multiply
    9,400.65x = 12,972.87 × 5,208.90
  4. Step 4: Simplify right side
    9,400.65x = 67,574,382.54
  5. Step 5: Solve for x
    x = 67,574,382.54/9,400.65
  6. Step 6: Final answer
    x = 7,188.27

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1.5x scale

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.