Home / 3,931.81-5,901.36-1,985.38

Finding the Fourth Proportional to 3,931.81, 5,901.36 and 1,985.38

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Solution

The fourth proportional to 3,931.81, 5,901.36 and 1,985.38 is: 2,979.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.81 : 5,901.36 = 1,985.38 : x
  2. Step 2: Convert to fraction form
    3,931.81/5,901.36 = 1,985.38/x
  3. Step 3: Cross multiply
    3,931.81x = 5,901.36 × 1,985.38
  4. Step 4: Simplify right side
    3,931.81x = 11,716,442.12
  5. Step 5: Solve for x
    x = 11,716,442.12/3,931.81
  6. Step 6: Final answer
    x = 2,979.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.