Home / 21,277.11-31,915.67-8,130.81

Finding the Fourth Proportional to 21,277.11, 31,915.67 and 8,130.81

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Solution

The fourth proportional to 21,277.11, 31,915.67 and 8,130.81 is: 12,196.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.11 : 31,915.67 = 8,130.81 : x
  2. Step 2: Convert to fraction form
    21,277.11/31,915.67 = 8,130.81/x
  3. Step 3: Cross multiply
    21,277.11x = 31,915.67 × 8,130.81
  4. Step 4: Simplify right side
    21,277.11x = 259,500,208.14
  5. Step 5: Solve for x
    x = 259,500,208.14/21,277.11
  6. Step 6: Final answer
    x = 12,196.22

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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.