Home / 3,931.80-5,894.70-1,985.40

Finding the Fourth Proportional to 3,931.80, 5,894.70 and 1,985.40

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Solution

The fourth proportional to 3,931.80, 5,894.70 and 1,985.40 is: 2,976.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.80 : 5,894.70 = 1,985.40 : x
  2. Step 2: Convert to fraction form
    3,931.80/5,894.70 = 1,985.40/x
  3. Step 3: Cross multiply
    3,931.80x = 5,894.70 × 1,985.40
  4. Step 4: Simplify right side
    3,931.80x = 11,703,337.38
  5. Step 5: Solve for x
    x = 11,703,337.38/3,931.80
  6. Step 6: Final answer
    x = 2,976.59

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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.