Home / 23,121.57-31,907.78-12,511.20

Finding the Fourth Proportional to 23,121.57, 31,907.78 and 12,511.20

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Solution

The fourth proportional to 23,121.57, 31,907.78 and 12,511.20 is: 17,265.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,121.57 : 31,907.78 = 12,511.20 : x
  2. Step 2: Convert to fraction form
    23,121.57/31,907.78 = 12,511.20/x
  3. Step 3: Cross multiply
    23,121.57x = 31,907.78 × 12,511.20
  4. Step 4: Simplify right side
    23,121.57x = 399,204,617.14
  5. Step 5: Solve for x
    x = 399,204,617.14/23,121.57
  6. Step 6: Final answer
    x = 17,265.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.