Home / 7,917.48-10,917.18-5,921.64

Finding the Fourth Proportional to 7,917.48, 10,917.18 and 5,921.64

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Solution

The fourth proportional to 7,917.48, 10,917.18 and 5,921.64 is: 8,165.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.48 : 10,917.18 = 5,921.64 : x
  2. Step 2: Convert to fraction form
    7,917.48/10,917.18 = 5,921.64/x
  3. Step 3: Cross multiply
    7,917.48x = 10,917.18 × 5,921.64
  4. Step 4: Simplify right side
    7,917.48x = 64,647,609.78
  5. Step 5: Solve for x
    x = 64,647,609.78/7,917.48
  6. Step 6: Final answer
    x = 8,165.18

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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.