Home / 21,142.38-31,717.23-9,456.51

Finding the Fourth Proportional to 21,142.38, 31,717.23 and 9,456.51

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Solution

The fourth proportional to 21,142.38, 31,717.23 and 9,456.51 is: 14,186.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.38 : 31,717.23 = 9,456.51 : x
  2. Step 2: Convert to fraction form
    21,142.38/31,717.23 = 9,456.51/x
  3. Step 3: Cross multiply
    21,142.38x = 31,717.23 × 9,456.51
  4. Step 4: Simplify right side
    21,142.38x = 299,934,302.67
  5. Step 5: Solve for x
    x = 299,934,302.67/21,142.38
  6. Step 6: Final answer
    x = 14,186.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.