Home / 5,167.78-7,131.51-2,809.92

Finding the Fourth Proportional to 5,167.78, 7,131.51 and 2,809.92

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Solution

The fourth proportional to 5,167.78, 7,131.51 and 2,809.92 is: 3,877.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,167.78 : 7,131.51 = 2,809.92 : x
  2. Step 2: Convert to fraction form
    5,167.78/7,131.51 = 2,809.92/x
  3. Step 3: Cross multiply
    5,167.78x = 7,131.51 × 2,809.92
  4. Step 4: Simplify right side
    5,167.78x = 20,038,972.58
  5. Step 5: Solve for x
    x = 20,038,972.58/5,167.78
  6. Step 6: Final answer
    x = 3,877.68

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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.