Home / 5,190.68-7,781.64-2,415.92

Finding the Fourth Proportional to 5,190.68, 7,781.64 and 2,415.92

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Solution

The fourth proportional to 5,190.68, 7,781.64 and 2,415.92 is: 3,621.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.68 : 7,781.64 = 2,415.92 : x
  2. Step 2: Convert to fraction form
    5,190.68/7,781.64 = 2,415.92/x
  3. Step 3: Cross multiply
    5,190.68x = 7,781.64 × 2,415.92
  4. Step 4: Simplify right side
    5,190.68x = 18,799,819.71
  5. Step 5: Solve for x
    x = 18,799,819.71/5,190.68
  6. Step 6: Final answer
    x = 3,621.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.