Home / 5,209.88-7,189.80-2,852.20

Finding the Fourth Proportional to 5,209.88, 7,189.80 and 2,852.20

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Solution

The fourth proportional to 5,209.88, 7,189.80 and 2,852.20 is: 3,936.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.88 : 7,189.80 = 2,852.20 : x
  2. Step 2: Convert to fraction form
    5,209.88/7,189.80 = 2,852.20/x
  3. Step 3: Cross multiply
    5,209.88x = 7,189.80 × 2,852.20
  4. Step 4: Simplify right side
    5,209.88x = 20,506,747.56
  5. Step 5: Solve for x
    x = 20,506,747.56/5,209.88
  6. Step 6: Final answer
    x = 3,936.13

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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.