Home / 3,987.04-5,501.76-2,218.56

Finding the Fourth Proportional to 3,987.04, 5,501.76 and 2,218.56

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Solution

The fourth proportional to 3,987.04, 5,501.76 and 2,218.56 is: 3,061.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.04 : 5,501.76 = 2,218.56 : x
  2. Step 2: Convert to fraction form
    3,987.04/5,501.76 = 2,218.56/x
  3. Step 3: Cross multiply
    3,987.04x = 5,501.76 × 2,218.56
  4. Step 4: Simplify right side
    3,987.04x = 12,205,984.67
  5. Step 5: Solve for x
    x = 12,205,984.67/3,987.04
  6. Step 6: Final answer
    x = 3,061.42

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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.