Home / 3,687.61-5,088.88-2,115.69

Finding the Fourth Proportional to 3,687.61, 5,088.88 and 2,115.69

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Solution

The fourth proportional to 3,687.61, 5,088.88 and 2,115.69 is: 2,919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,687.61 : 5,088.88 = 2,115.69 : x
  2. Step 2: Convert to fraction form
    3,687.61/5,088.88 = 2,115.69/x
  3. Step 3: Cross multiply
    3,687.61x = 5,088.88 × 2,115.69
  4. Step 4: Simplify right side
    3,687.61x = 10,766,492.53
  5. Step 5: Solve for x
    x = 10,766,492.53/3,687.61
  6. Step 6: Final answer
    x = 2,919.64

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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.