Home / 7,220.40-9,964.20-4,387.20

Finding the Fourth Proportional to 7,220.40, 9,964.20 and 4,387.20

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Solution

The fourth proportional to 7,220.40, 9,964.20 and 4,387.20 is: 6,054.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.40 : 9,964.20 = 4,387.20 : x
  2. Step 2: Convert to fraction form
    7,220.40/9,964.20 = 4,387.20/x
  3. Step 3: Cross multiply
    7,220.40x = 9,964.20 × 4,387.20
  4. Step 4: Simplify right side
    7,220.40x = 43,714,938.24
  5. Step 5: Solve for x
    x = 43,714,938.24/7,220.40
  6. Step 6: Final answer
    x = 6,054.37

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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.