Home / 21,147.26-31,710.95-12,265.11

Finding the Fourth Proportional to 21,147.26, 31,710.95 and 12,265.11

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Solution

The fourth proportional to 21,147.26, 31,710.95 and 12,265.11 is: 18,391.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.26 : 31,710.95 = 12,265.11 : x
  2. Step 2: Convert to fraction form
    21,147.26/31,710.95 = 12,265.11/x
  3. Step 3: Cross multiply
    21,147.26x = 31,710.95 × 12,265.11
  4. Step 4: Simplify right side
    21,147.26x = 388,938,228.63
  5. Step 5: Solve for x
    x = 388,938,228.63/21,147.26
  6. Step 6: Final answer
    x = 18,391.90

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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.