Home / 3,988.10-5,503.71-2,195.78

Finding the Fourth Proportional to 3,988.10, 5,503.71 and 2,195.78

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Solution

The fourth proportional to 3,988.10, 5,503.71 and 2,195.78 is: 3,030.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.10 : 5,503.71 = 2,195.78 : x
  2. Step 2: Convert to fraction form
    3,988.10/5,503.71 = 2,195.78/x
  3. Step 3: Cross multiply
    3,988.10x = 5,503.71 × 2,195.78
  4. Step 4: Simplify right side
    3,988.10x = 12,084,917.06
  5. Step 5: Solve for x
    x = 12,084,917.06/3,988.10
  6. Step 6: Final answer
    x = 3,030.24

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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.