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Finding the Fourth Proportional to 31,321.32, 43,223.40 and 17,174.40

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Solution

The fourth proportional to 31,321.32, 43,223.40 and 17,174.40 is: 23,700.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,321.32 : 43,223.40 = 17,174.40 : x
  2. Step 2: Convert to fraction form
    31,321.32/43,223.40 = 17,174.40/x
  3. Step 3: Cross multiply
    31,321.32x = 43,223.40 × 17,174.40
  4. Step 4: Simplify right side
    31,321.32x = 742,335,960.96
  5. Step 5: Solve for x
    x = 742,335,960.96/31,321.32
  6. Step 6: Final answer
    x = 23,700.66

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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.