Home / 5,170.81-7,135.72-2,812.95

Finding the Fourth Proportional to 5,170.81, 7,135.72 and 2,812.95

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Solution

The fourth proportional to 5,170.81, 7,135.72 and 2,812.95 is: 3,881.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,170.81 : 7,135.72 = 2,812.95 : x
  2. Step 2: Convert to fraction form
    5,170.81/7,135.72 = 2,812.95/x
  3. Step 3: Cross multiply
    5,170.81x = 7,135.72 × 2,812.95
  4. Step 4: Simplify right side
    5,170.81x = 20,072,373.83
  5. Step 5: Solve for x
    x = 20,072,373.83/5,170.81
  6. Step 6: Final answer
    x = 3,881.86

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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.