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Finding the Fourth Proportional to 15,178.67, 20,946.08 and 8,279.57

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Solution

The fourth proportional to 15,178.67, 20,946.08 and 8,279.57 is: 11,425.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.67 : 20,946.08 = 8,279.57 : x
  2. Step 2: Convert to fraction form
    15,178.67/20,946.08 = 8,279.57/x
  3. Step 3: Cross multiply
    15,178.67x = 20,946.08 × 8,279.57
  4. Step 4: Simplify right side
    15,178.67x = 173,424,444.26
  5. Step 5: Solve for x
    x = 173,424,444.26/15,178.67
  6. Step 6: Final answer
    x = 11,425.54

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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.