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Finding the Fourth Proportional to 15,173.78, 20,939.88 and 8,459.52

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Solution

The fourth proportional to 15,173.78, 20,939.88 and 8,459.52 is: 11,674.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,173.78 : 20,939.88 = 8,459.52 : x
  2. Step 2: Convert to fraction form
    15,173.78/20,939.88 = 8,459.52/x
  3. Step 3: Cross multiply
    15,173.78x = 20,939.88 × 8,459.52
  4. Step 4: Simplify right side
    15,173.78x = 177,141,333.66
  5. Step 5: Solve for x
    x = 177,141,333.66/15,173.78
  6. Step 6: Final answer
    x = 11,674.18

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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.