Home / 3,987.36-5,501.90-2,218.92

Finding the Fourth Proportional to 3,987.36, 5,501.90 and 2,218.92

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Solution

The fourth proportional to 3,987.36, 5,501.90 and 2,218.92 is: 3,061.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.36 : 5,501.90 = 2,218.92 : x
  2. Step 2: Convert to fraction form
    3,987.36/5,501.90 = 2,218.92/x
  3. Step 3: Cross multiply
    3,987.36x = 5,501.90 × 2,218.92
  4. Step 4: Simplify right side
    3,987.36x = 12,208,275.95
  5. Step 5: Solve for x
    x = 12,208,275.95/3,987.36
  6. Step 6: Final answer
    x = 3,061.74

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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.