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Finding the Fourth Proportional to 31,603.91, 43,622.08 and 19,660.12

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Solution

The fourth proportional to 31,603.91, 43,622.08 and 19,660.12 is: 27,136.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,603.91 : 43,622.08 = 19,660.12 : x
  2. Step 2: Convert to fraction form
    31,603.91/43,622.08 = 19,660.12/x
  3. Step 3: Cross multiply
    31,603.91x = 43,622.08 × 19,660.12
  4. Step 4: Simplify right side
    31,603.91x = 857,615,169.24
  5. Step 5: Solve for x
    x = 857,615,169.24/31,603.91
  6. Step 6: Final answer
    x = 27,136.37

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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.