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Finding the Fourth Proportional to 14,621.16, 20,177.16 and 7,906.74

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Solution

The fourth proportional to 14,621.16, 20,177.16 and 7,906.74 is: 10,911.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,621.16 : 20,177.16 = 7,906.74 : x
  2. Step 2: Convert to fraction form
    14,621.16/20,177.16 = 7,906.74/x
  3. Step 3: Cross multiply
    14,621.16x = 20,177.16 × 7,906.74
  4. Step 4: Simplify right side
    14,621.16x = 159,535,558.06
  5. Step 5: Solve for x
    x = 159,535,558.06/14,621.16
  6. Step 6: Final answer
    x = 10,911.28

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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.