Home / 8,921.25-12,311.33-5,195.25

Finding the Fourth Proportional to 8,921.25, 12,311.33 and 5,195.25

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Solution

The fourth proportional to 8,921.25, 12,311.33 and 5,195.25 is: 7,169.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.25 : 12,311.33 = 5,195.25 : x
  2. Step 2: Convert to fraction form
    8,921.25/12,311.33 = 5,195.25/x
  3. Step 3: Cross multiply
    8,921.25x = 12,311.33 × 5,195.25
  4. Step 4: Simplify right side
    8,921.25x = 63,960,411.21
  5. Step 5: Solve for x
    x = 63,960,411.21/8,921.25
  6. Step 6: Final answer
    x = 7,169.45

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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.