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Finding the Fourth Proportional to 5,739.13, 7,920.01 and 3,221.00

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Solution

The fourth proportional to 5,739.13, 7,920.01 and 3,221.00 is: 4,444.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.13 : 7,920.01 = 3,221.00 : x
  2. Step 2: Convert to fraction form
    5,739.13/7,920.01 = 3,221.00/x
  3. Step 3: Cross multiply
    5,739.13x = 7,920.01 × 3,221.00
  4. Step 4: Simplify right side
    5,739.13x = 25,510,328.22
  5. Step 5: Solve for x
    x = 25,510,328.22/5,739.13
  6. Step 6: Final answer
    x = 4,444.99

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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.