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Finding the Fourth Proportional to 15,178.88, 20,946.94 and 8,464.79

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Solution

The fourth proportional to 15,178.88, 20,946.94 and 8,464.79 is: 11,681.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.88 : 20,946.94 = 8,464.79 : x
  2. Step 2: Convert to fraction form
    15,178.88/20,946.94 = 8,464.79/x
  3. Step 3: Cross multiply
    15,178.88x = 20,946.94 × 8,464.79
  4. Step 4: Simplify right side
    15,178.88x = 177,311,361.62
  5. Step 5: Solve for x
    x = 177,311,361.62/15,178.88
  6. Step 6: Final answer
    x = 11,681.45

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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.