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Finding the Fourth Proportional to 7,210.12, 9,949.98 and 3,898.12

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Solution

The fourth proportional to 7,210.12, 9,949.98 and 3,898.12 is: 5,379.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,210.12 : 9,949.98 = 3,898.12 : x
  2. Step 2: Convert to fraction form
    7,210.12/9,949.98 = 3,898.12/x
  3. Step 3: Cross multiply
    7,210.12x = 9,949.98 × 3,898.12
  4. Step 4: Simplify right side
    7,210.12x = 38,786,216.04
  5. Step 5: Solve for x
    x = 38,786,216.04/7,210.12
  6. Step 6: Final answer
    x = 5,379.41

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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.