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Finding the Fourth Proportional to 15,173.15, 20,938.74 and 8,458.79

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Solution

The fourth proportional to 15,173.15, 20,938.74 and 8,458.79 is: 11,673.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,173.15 : 20,938.74 = 8,458.79 : x
  2. Step 2: Convert to fraction form
    15,173.15/20,938.74 = 8,458.79/x
  3. Step 3: Cross multiply
    15,173.15x = 20,938.74 × 8,458.79
  4. Step 4: Simplify right side
    15,173.15x = 177,116,299.83
  5. Step 5: Solve for x
    x = 177,116,299.83/15,173.15
  6. Step 6: Final answer
    x = 11,673.01

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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.