Home / 5,780.95-7,977.71-3,128.36

Finding the Fourth Proportional to 5,780.95, 7,977.71 and 3,128.36

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Solution

The fourth proportional to 5,780.95, 7,977.71 and 3,128.36 is: 4,317.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,780.95 : 7,977.71 = 3,128.36 : x
  2. Step 2: Convert to fraction form
    5,780.95/7,977.71 = 3,128.36/x
  3. Step 3: Cross multiply
    5,780.95x = 7,977.71 × 3,128.36
  4. Step 4: Simplify right side
    5,780.95x = 24,957,148.86
  5. Step 5: Solve for x
    x = 24,957,148.86/5,780.95
  6. Step 6: Final answer
    x = 4,317.14

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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.