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Finding the Fourth Proportional to 15,220.86, 21,004.73 and 8,506.48

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Solution

The fourth proportional to 15,220.86, 21,004.73 and 8,506.48 is: 11,738.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.86 : 21,004.73 = 8,506.48 : x
  2. Step 2: Convert to fraction form
    15,220.86/21,004.73 = 8,506.48/x
  3. Step 3: Cross multiply
    15,220.86x = 21,004.73 × 8,506.48
  4. Step 4: Simplify right side
    15,220.86x = 178,676,315.65
  5. Step 5: Solve for x
    x = 178,676,315.65/15,220.86
  6. Step 6: Final answer
    x = 11,738.91

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Double scale
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Similar ratio
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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.