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Finding the Fourth Proportional to 8,220.65, 11,349.79 and 7,334.91

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Solution

The fourth proportional to 8,220.65, 11,349.79 and 7,334.91 is: 10,126.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220.65 : 11,349.79 = 7,334.91 : x
  2. Step 2: Convert to fraction form
    8,220.65/11,349.79 = 7,334.91/x
  3. Step 3: Cross multiply
    8,220.65x = 11,349.79 × 7,334.91
  4. Step 4: Simplify right side
    8,220.65x = 83,249,669.83
  5. Step 5: Solve for x
    x = 83,249,669.83/8,220.65
  6. Step 6: Final answer
    x = 10,126.90

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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.