Home / 5,460.16-8,190.80-2,172.80

Finding the Fourth Proportional to 5,460.16, 8,190.80 and 2,172.80

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Solution

The fourth proportional to 5,460.16, 8,190.80 and 2,172.80 is: 3,259.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,460.16 : 8,190.80 = 2,172.80 : x
  2. Step 2: Convert to fraction form
    5,460.16/8,190.80 = 2,172.80/x
  3. Step 3: Cross multiply
    5,460.16x = 8,190.80 × 2,172.80
  4. Step 4: Simplify right side
    5,460.16x = 17,796,970.24
  5. Step 5: Solve for x
    x = 17,796,970.24/5,460.16
  6. Step 6: Final answer
    x = 3,259.42

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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.