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Finding the Fourth Proportional to 18,620.64, 25,695.18 and 13,327.92

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Solution

The fourth proportional to 18,620.64, 25,695.18 and 13,327.92 is: 18,391.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.64 : 25,695.18 = 13,327.92 : x
  2. Step 2: Convert to fraction form
    18,620.64/25,695.18 = 13,327.92/x
  3. Step 3: Cross multiply
    18,620.64x = 25,695.18 × 13,327.92
  4. Step 4: Simplify right side
    18,620.64x = 342,463,303.43
  5. Step 5: Solve for x
    x = 342,463,303.43/18,620.64
  6. Step 6: Final answer
    x = 18,391.60

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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.