Home / 7,405.21-10,218.89-4,218.68

Finding the Fourth Proportional to 7,405.21, 10,218.89 and 4,218.68

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Solution

The fourth proportional to 7,405.21, 10,218.89 and 4,218.68 is: 5,821.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.21 : 10,218.89 = 4,218.68 : x
  2. Step 2: Convert to fraction form
    7,405.21/10,218.89 = 4,218.68/x
  3. Step 3: Cross multiply
    7,405.21x = 10,218.89 × 4,218.68
  4. Step 4: Simplify right side
    7,405.21x = 43,110,262.96
  5. Step 5: Solve for x
    x = 43,110,262.96/7,405.21
  6. Step 6: Final answer
    x = 5,821.62

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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.