Home / 21,133.78-31,703.76-6,343.87

Finding the Fourth Proportional to 21,133.78, 31,703.76 and 6,343.87

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Solution

The fourth proportional to 21,133.78, 31,703.76 and 6,343.87 is: 9,516.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.78 : 31,703.76 = 6,343.87 : x
  2. Step 2: Convert to fraction form
    21,133.78/31,703.76 = 6,343.87/x
  3. Step 3: Cross multiply
    21,133.78x = 31,703.76 × 6,343.87
  4. Step 4: Simplify right side
    21,133.78x = 201,124,531.95
  5. Step 5: Solve for x
    x = 201,124,531.95/21,133.78
  6. Step 6: Final answer
    x = 9,516.73

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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.