Home / 3,987.24-5,502.40-2,218.86

Finding the Fourth Proportional to 3,987.24, 5,502.40 and 2,218.86

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Solution

The fourth proportional to 3,987.24, 5,502.40 and 2,218.86 is: 3,062.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.24 : 5,502.40 = 2,218.86 : x
  2. Step 2: Convert to fraction form
    3,987.24/5,502.40 = 2,218.86/x
  3. Step 3: Cross multiply
    3,987.24x = 5,502.40 × 2,218.86
  4. Step 4: Simplify right side
    3,987.24x = 12,209,055.26
  5. Step 5: Solve for x
    x = 12,209,055.26/3,987.24
  6. Step 6: Final answer
    x = 3,062.03

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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.