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Finding the Fourth Proportional to 18,728.64, 25,845.48 and 10,345.12

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Solution

The fourth proportional to 18,728.64, 25,845.48 and 10,345.12 is: 14,276.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.64 : 25,845.48 = 10,345.12 : x
  2. Step 2: Convert to fraction form
    18,728.64/25,845.48 = 10,345.12/x
  3. Step 3: Cross multiply
    18,728.64x = 25,845.48 × 10,345.12
  4. Step 4: Simplify right side
    18,728.64x = 267,374,592.06
  5. Step 5: Solve for x
    x = 267,374,592.06/18,728.64
  6. Step 6: Final answer
    x = 14,276.24

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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.