Home / 3,988.71-5,504.40-2,220.66

Finding the Fourth Proportional to 3,988.71, 5,504.40 and 2,220.66

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Solution

The fourth proportional to 3,988.71, 5,504.40 and 2,220.66 is: 3,064.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.71 : 5,504.40 = 2,220.66 : x
  2. Step 2: Convert to fraction form
    3,988.71/5,504.40 = 2,220.66/x
  3. Step 3: Cross multiply
    3,988.71x = 5,504.40 × 2,220.66
  4. Step 4: Simplify right side
    3,988.71x = 12,223,400.90
  5. Step 5: Solve for x
    x = 12,223,400.90/3,988.71
  6. Step 6: Final answer
    x = 3,064.50

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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.