Home / 7,138.86-9,851.51-3,995.04

Finding the Fourth Proportional to 7,138.86, 9,851.51 and 3,995.04

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Solution

The fourth proportional to 7,138.86, 9,851.51 and 3,995.04 is: 5,513.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.86 : 9,851.51 = 3,995.04 : x
  2. Step 2: Convert to fraction form
    7,138.86/9,851.51 = 3,995.04/x
  3. Step 3: Cross multiply
    7,138.86x = 9,851.51 × 3,995.04
  4. Step 4: Simplify right side
    7,138.86x = 39,357,156.54
  5. Step 5: Solve for x
    x = 39,357,156.54/7,138.86
  6. Step 6: Final answer
    x = 5,513.09

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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.