Home / 3,987.75-5,500.28-3,386.11

Finding the Fourth Proportional to 3,987.75, 5,500.28 and 3,386.11

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Solution

The fourth proportional to 3,987.75, 5,500.28 and 3,386.11 is: 4,670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.75 : 5,500.28 = 3,386.11 : x
  2. Step 2: Convert to fraction form
    3,987.75/5,500.28 = 3,386.11/x
  3. Step 3: Cross multiply
    3,987.75x = 5,500.28 × 3,386.11
  4. Step 4: Simplify right side
    3,987.75x = 18,624,564.08
  5. Step 5: Solve for x
    x = 18,624,564.08/3,987.75
  6. Step 6: Final answer
    x = 4,670.45

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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.