Home / 7,405.50-10,218.70-4,218.81

Finding the Fourth Proportional to 7,405.50, 10,218.70 and 4,218.81

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Solution

The fourth proportional to 7,405.50, 10,218.70 and 4,218.81 is: 5,821.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.50 : 10,218.70 = 4,218.81 : x
  2. Step 2: Convert to fraction form
    7,405.50/10,218.70 = 4,218.81/x
  3. Step 3: Cross multiply
    7,405.50x = 10,218.70 × 4,218.81
  4. Step 4: Simplify right side
    7,405.50x = 43,110,720.70
  5. Step 5: Solve for x
    x = 43,110,720.70/7,405.50
  6. Step 6: Final answer
    x = 5,821.44

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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.