Home / 3,911.60-5,387.64-2,913.68

Finding the Fourth Proportional to 3,911.60, 5,387.64 and 2,913.68

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Solution

The fourth proportional to 3,911.60, 5,387.64 and 2,913.68 is: 4,013.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.60 : 5,387.64 = 2,913.68 : x
  2. Step 2: Convert to fraction form
    3,911.60/5,387.64 = 2,913.68/x
  3. Step 3: Cross multiply
    3,911.60x = 5,387.64 × 2,913.68
  4. Step 4: Simplify right side
    3,911.60x = 15,697,858.92
  5. Step 5: Solve for x
    x = 15,697,858.92/3,911.60
  6. Step 6: Final answer
    x = 4,013.16

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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.