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Finding the Fourth Proportional to 18,311.64, 25,261.02 and 12,335.64

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Solution

The fourth proportional to 18,311.64, 25,261.02 and 12,335.64 is: 17,017.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.64 : 25,261.02 = 12,335.64 : x
  2. Step 2: Convert to fraction form
    18,311.64/25,261.02 = 12,335.64/x
  3. Step 3: Cross multiply
    18,311.64x = 25,261.02 × 12,335.64
  4. Step 4: Simplify right side
    18,311.64x = 311,610,848.75
  5. Step 5: Solve for x
    x = 311,610,848.75/18,311.64
  6. Step 6: Final answer
    x = 17,017.09

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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.