Home / 6,921.02-10,381.80-2,761.40

Finding the Fourth Proportional to 6,921.02, 10,381.80 and 2,761.40

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Solution

The fourth proportional to 6,921.02, 10,381.80 and 2,761.40 is: 4,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.02 : 10,381.80 = 2,761.40 : x
  2. Step 2: Convert to fraction form
    6,921.02/10,381.80 = 2,761.40/x
  3. Step 3: Cross multiply
    6,921.02x = 10,381.80 × 2,761.40
  4. Step 4: Simplify right side
    6,921.02x = 28,668,302.52
  5. Step 5: Solve for x
    x = 28,668,302.52/6,921.02
  6. Step 6: Final answer
    x = 4,142.21

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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.