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Finding the Fourth Proportional to 15,178.75, 20,948.72 and 8,893.63

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Solution

The fourth proportional to 15,178.75, 20,948.72 and 8,893.63 is: 12,274.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.75 : 20,948.72 = 8,893.63 : x
  2. Step 2: Convert to fraction form
    15,178.75/20,948.72 = 8,893.63/x
  3. Step 3: Cross multiply
    15,178.75x = 20,948.72 × 8,893.63
  4. Step 4: Simplify right side
    15,178.75x = 186,310,164.65
  5. Step 5: Solve for x
    x = 186,310,164.65/15,178.75
  6. Step 6: Final answer
    x = 12,274.41

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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.