Home / 5,159.95-7,121.87-3,391.72

Finding the Fourth Proportional to 5,159.95, 7,121.87 and 3,391.72

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Solution

The fourth proportional to 5,159.95, 7,121.87 and 3,391.72 is: 4,681.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.95 : 7,121.87 = 3,391.72 : x
  2. Step 2: Convert to fraction form
    5,159.95/7,121.87 = 3,391.72/x
  3. Step 3: Cross multiply
    5,159.95x = 7,121.87 × 3,391.72
  4. Step 4: Simplify right side
    5,159.95x = 24,155,371.96
  5. Step 5: Solve for x
    x = 24,155,371.96/5,159.95
  6. Step 6: Final answer
    x = 4,681.32

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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.