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Finding the Fourth Proportional to 14,660.72, 20,231.72 and 7,946.32

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Solution

The fourth proportional to 14,660.72, 20,231.72 and 7,946.32 is: 10,965.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,660.72 : 20,231.72 = 7,946.32 : x
  2. Step 2: Convert to fraction form
    14,660.72/20,231.72 = 7,946.32/x
  3. Step 3: Cross multiply
    14,660.72x = 20,231.72 × 7,946.32
  4. Step 4: Simplify right side
    14,660.72x = 160,767,721.27
  5. Step 5: Solve for x
    x = 160,767,721.27/14,660.72
  6. Step 6: Final answer
    x = 10,965.88

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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.