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Finding the Fourth Proportional to 31,187, 43,038.97 and 17,040.76

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Solution

The fourth proportional to 31,187, 43,038.97 and 17,040.76 is: 23,516.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,187 : 43,038.97 = 17,040.76 : x
  2. Step 2: Convert to fraction form
    31,187/43,038.97 = 17,040.76/x
  3. Step 3: Cross multiply
    31,187x = 43,038.97 × 17,040.76
  4. Step 4: Simplify right side
    31,187x = 733,416,758.42
  5. Step 5: Solve for x
    x = 733,416,758.42/31,187
  6. Step 6: Final answer
    x = 23,516.75

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Double scale
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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.