Home / 5,128.11-7,686.97-2,356.76

Finding the Fourth Proportional to 5,128.11, 7,686.97 and 2,356.76

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Solution

The fourth proportional to 5,128.11, 7,686.97 and 2,356.76 is: 3,532.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.11 : 7,686.97 = 2,356.76 : x
  2. Step 2: Convert to fraction form
    5,128.11/7,686.97 = 2,356.76/x
  3. Step 3: Cross multiply
    5,128.11x = 7,686.97 × 2,356.76
  4. Step 4: Simplify right side
    5,128.11x = 18,116,356.74
  5. Step 5: Solve for x
    x = 18,116,356.74/5,128.11
  6. Step 6: Final answer
    x = 3,532.76

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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.