Home / 7,212.16-9,952.70-3,900.16

Finding the Fourth Proportional to 7,212.16, 9,952.70 and 3,900.16

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Solution

The fourth proportional to 7,212.16, 9,952.70 and 3,900.16 is: 5,382.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.16 : 9,952.70 = 3,900.16 : x
  2. Step 2: Convert to fraction form
    7,212.16/9,952.70 = 3,900.16/x
  3. Step 3: Cross multiply
    7,212.16x = 9,952.70 × 3,900.16
  4. Step 4: Simplify right side
    7,212.16x = 38,817,122.43
  5. Step 5: Solve for x
    x = 38,817,122.43/7,212.16
  6. Step 6: Final answer
    x = 5,382.18

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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.