Home / 7,406.89-10,220.36-4,219.78

Finding the Fourth Proportional to 7,406.89, 10,220.36 and 4,219.78

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Solution

The fourth proportional to 7,406.89, 10,220.36 and 4,219.78 is: 5,822.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,406.89 : 10,220.36 = 4,219.78 : x
  2. Step 2: Convert to fraction form
    7,406.89/10,220.36 = 4,219.78/x
  3. Step 3: Cross multiply
    7,406.89x = 10,220.36 × 4,219.78
  4. Step 4: Simplify right side
    7,406.89x = 43,127,624.07
  5. Step 5: Solve for x
    x = 43,127,624.07/7,406.89
  6. Step 6: Final answer
    x = 5,822.64

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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.