Home / 8,289.76-11,425.45-7,220.86

Finding the Fourth Proportional to 8,289.76, 11,425.45 and 7,220.86

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Solution

The fourth proportional to 8,289.76, 11,425.45 and 7,220.86 is: 9,952.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,289.76 : 11,425.45 = 7,220.86 : x
  2. Step 2: Convert to fraction form
    8,289.76/11,425.45 = 7,220.86/x
  3. Step 3: Cross multiply
    8,289.76x = 11,425.45 × 7,220.86
  4. Step 4: Simplify right side
    8,289.76x = 82,501,571.12
  5. Step 5: Solve for x
    x = 82,501,571.12/8,289.76
  6. Step 6: Final answer
    x = 9,952.23

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Double scale
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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.