Home / 3,988.57-5,503.98-2,309.86

Finding the Fourth Proportional to 3,988.57, 5,503.98 and 2,309.86

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Solution

The fourth proportional to 3,988.57, 5,503.98 and 2,309.86 is: 3,187.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.57 : 5,503.98 = 2,309.86 : x
  2. Step 2: Convert to fraction form
    3,988.57/5,503.98 = 2,309.86/x
  3. Step 3: Cross multiply
    3,988.57x = 5,503.98 × 2,309.86
  4. Step 4: Simplify right side
    3,988.57x = 12,713,423.30
  5. Step 5: Solve for x
    x = 12,713,423.30/3,988.57
  6. Step 6: Final answer
    x = 3,187.47

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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.