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Finding the Fourth Proportional to 18,628.32, 25,704 and 11,079.12

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Solution

The fourth proportional to 18,628.32, 25,704 and 11,079.12 is: 15,287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.32 : 25,704 = 11,079.12 : x
  2. Step 2: Convert to fraction form
    18,628.32/25,704 = 11,079.12/x
  3. Step 3: Cross multiply
    18,628.32x = 25,704 × 11,079.12
  4. Step 4: Simplify right side
    18,628.32x = 284,777,700.48
  5. Step 5: Solve for x
    x = 284,777,700.48/18,628.32
  6. Step 6: Final answer
    x = 15,287.35

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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.