Home / 8,320.64-11,472.26-5,171.36

Finding the Fourth Proportional to 8,320.64, 11,472.26 and 5,171.36

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Solution

The fourth proportional to 8,320.64, 11,472.26 and 5,171.36 is: 7,130.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.64 : 11,472.26 = 5,171.36 : x
  2. Step 2: Convert to fraction form
    8,320.64/11,472.26 = 5,171.36/x
  3. Step 3: Cross multiply
    8,320.64x = 11,472.26 × 5,171.36
  4. Step 4: Simplify right side
    8,320.64x = 59,327,103.26
  5. Step 5: Solve for x
    x = 59,327,103.26/8,320.64
  6. Step 6: Final answer
    x = 7,130.12

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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.