Home / 3,940.15-5,437.29-2,147.59

Finding the Fourth Proportional to 3,940.15, 5,437.29 and 2,147.59

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Solution

The fourth proportional to 3,940.15, 5,437.29 and 2,147.59 is: 2,963.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.15 : 5,437.29 = 2,147.59 : x
  2. Step 2: Convert to fraction form
    3,940.15/5,437.29 = 2,147.59/x
  3. Step 3: Cross multiply
    3,940.15x = 5,437.29 × 2,147.59
  4. Step 4: Simplify right side
    3,940.15x = 11,677,031.71
  5. Step 5: Solve for x
    x = 11,677,031.71/3,940.15
  6. Step 6: Final answer
    x = 2,963.60

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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.