Home / 9,221.31-12,722.40-5,443.20

Finding the Fourth Proportional to 9,221.31, 12,722.40 and 5,443.20

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Solution

The fourth proportional to 9,221.31, 12,722.40 and 5,443.20 is: 7,509.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,221.31 : 12,722.40 = 5,443.20 : x
  2. Step 2: Convert to fraction form
    9,221.31/12,722.40 = 5,443.20/x
  3. Step 3: Cross multiply
    9,221.31x = 12,722.40 × 5,443.20
  4. Step 4: Simplify right side
    9,221.31x = 69,250,567.68
  5. Step 5: Solve for x
    x = 69,250,567.68/9,221.31
  6. Step 6: Final answer
    x = 7,509.84

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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.