Home / 21,253.47-31,881.27-8,106.87

Finding the Fourth Proportional to 21,253.47, 31,881.27 and 8,106.87

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Solution

The fourth proportional to 21,253.47, 31,881.27 and 8,106.87 is: 12,160.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.47 : 31,881.27 = 8,106.87 : x
  2. Step 2: Convert to fraction form
    21,253.47/31,881.27 = 8,106.87/x
  3. Step 3: Cross multiply
    21,253.47x = 31,881.27 × 8,106.87
  4. Step 4: Simplify right side
    21,253.47x = 258,457,311.32
  5. Step 5: Solve for x
    x = 258,457,311.32/21,253.47
  6. Step 6: Final answer
    x = 12,160.71

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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.