Home / 5,275.80-7,910.78-2,158.00

Finding the Fourth Proportional to 5,275.80, 7,910.78 and 2,158.00

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Solution

The fourth proportional to 5,275.80, 7,910.78 and 2,158.00 is: 3,235.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.80 : 7,910.78 = 2,158.00 : x
  2. Step 2: Convert to fraction form
    5,275.80/7,910.78 = 2,158.00/x
  3. Step 3: Cross multiply
    5,275.80x = 7,910.78 × 2,158.00
  4. Step 4: Simplify right side
    5,275.80x = 17,071,461.44
  5. Step 5: Solve for x
    x = 17,071,461.44/5,275.80
  6. Step 6: Final answer
    x = 3,235.80

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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.