Home / 5,130.30-7,079.87-2,891.98

Finding the Fourth Proportional to 5,130.30, 7,079.87 and 2,891.98

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Solution

The fourth proportional to 5,130.30, 7,079.87 and 2,891.98 is: 3,990.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.30 : 7,079.87 = 2,891.98 : x
  2. Step 2: Convert to fraction form
    5,130.30/7,079.87 = 2,891.98/x
  3. Step 3: Cross multiply
    5,130.30x = 7,079.87 × 2,891.98
  4. Step 4: Simplify right side
    5,130.30x = 20,474,810.28
  5. Step 5: Solve for x
    x = 20,474,810.28/5,130.30
  6. Step 6: Final answer
    x = 3,990.96

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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.