Home / 3,987.84-5,503.36-2,219.36

Finding the Fourth Proportional to 3,987.84, 5,503.36 and 2,219.36

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Solution

The fourth proportional to 3,987.84, 5,503.36 and 2,219.36 is: 3,062.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.84 : 5,503.36 = 2,219.36 : x
  2. Step 2: Convert to fraction form
    3,987.84/5,503.36 = 2,219.36/x
  3. Step 3: Cross multiply
    3,987.84x = 5,503.36 × 2,219.36
  4. Step 4: Simplify right side
    3,987.84x = 12,213,937.05
  5. Step 5: Solve for x
    x = 12,213,937.05/3,987.84
  6. Step 6: Final answer
    x = 3,062.80

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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.