Home / 5,108.02-7,048.87-3,121.90

Finding the Fourth Proportional to 5,108.02, 7,048.87 and 3,121.90

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Solution

The fourth proportional to 5,108.02, 7,048.87 and 3,121.90 is: 4,308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.02 : 7,048.87 = 3,121.90 : x
  2. Step 2: Convert to fraction form
    5,108.02/7,048.87 = 3,121.90/x
  3. Step 3: Cross multiply
    5,108.02x = 7,048.87 × 3,121.90
  4. Step 4: Simplify right side
    5,108.02x = 22,005,867.25
  5. Step 5: Solve for x
    x = 22,005,867.25/5,108.02
  6. Step 6: Final answer
    x = 4,308.10

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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.