Home / 3,988.40-5,498.30-2,661.62

Finding the Fourth Proportional to 3,988.40, 5,498.30 and 2,661.62

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Solution

The fourth proportional to 3,988.40, 5,498.30 and 2,661.62 is: 3,669.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.40 : 5,498.30 = 2,661.62 : x
  2. Step 2: Convert to fraction form
    3,988.40/5,498.30 = 2,661.62/x
  3. Step 3: Cross multiply
    3,988.40x = 5,498.30 × 2,661.62
  4. Step 4: Simplify right side
    3,988.40x = 14,634,385.25
  5. Step 5: Solve for x
    x = 14,634,385.25/3,988.40
  6. Step 6: Final answer
    x = 3,669.24

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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.