Home / 3,688.10-5,089.29-2,115.86

Finding the Fourth Proportional to 3,688.10, 5,089.29 and 2,115.86

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Solution

The fourth proportional to 3,688.10, 5,089.29 and 2,115.86 is: 2,919.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.10 : 5,089.29 = 2,115.86 : x
  2. Step 2: Convert to fraction form
    3,688.10/5,089.29 = 2,115.86/x
  3. Step 3: Cross multiply
    3,688.10x = 5,089.29 × 2,115.86
  4. Step 4: Simplify right side
    3,688.10x = 10,768,225.14
  5. Step 5: Solve for x
    x = 10,768,225.14/3,688.10
  6. Step 6: Final answer
    x = 2,919.72

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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.