Home / 5,412.80-8,108.40-2,817.20

Finding the Fourth Proportional to 5,412.80, 8,108.40 and 2,817.20

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Solution

The fourth proportional to 5,412.80, 8,108.40 and 2,817.20 is: 4,220.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.80 : 8,108.40 = 2,817.20 : x
  2. Step 2: Convert to fraction form
    5,412.80/8,108.40 = 2,817.20/x
  3. Step 3: Cross multiply
    5,412.80x = 8,108.40 × 2,817.20
  4. Step 4: Simplify right side
    5,412.80x = 22,842,984.48
  5. Step 5: Solve for x
    x = 22,842,984.48/5,412.80
  6. Step 6: Final answer
    x = 4,220.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.