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Finding the Fourth Proportional to 18,658.08, 25,704.35 and 12,983.07

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Solution

The fourth proportional to 18,658.08, 25,704.35 and 12,983.07 is: 17,886.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.08 : 25,704.35 = 12,983.07 : x
  2. Step 2: Convert to fraction form
    18,658.08/25,704.35 = 12,983.07/x
  3. Step 3: Cross multiply
    18,658.08x = 25,704.35 × 12,983.07
  4. Step 4: Simplify right side
    18,658.08x = 333,721,383.96
  5. Step 5: Solve for x
    x = 333,721,383.96/18,658.08
  6. Step 6: Final answer
    x = 17,886.16

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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.