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Finding the Fourth Proportional to 15,048.78, 20,769.90 and 8,674.24

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Solution

The fourth proportional to 15,048.78, 20,769.90 and 8,674.24 is: 11,971.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,048.78 : 20,769.90 = 8,674.24 : x
  2. Step 2: Convert to fraction form
    15,048.78/20,769.90 = 8,674.24/x
  3. Step 3: Cross multiply
    15,048.78x = 20,769.90 × 8,674.24
  4. Step 4: Simplify right side
    15,048.78x = 180,163,097.38
  5. Step 5: Solve for x
    x = 180,163,097.38/15,048.78
  6. Step 6: Final answer
    x = 11,971.94

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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.