Home / 23,121.84-31,908.13-12,511.47

Finding the Fourth Proportional to 23,121.84, 31,908.13 and 12,511.47

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Solution

The fourth proportional to 23,121.84, 31,908.13 and 12,511.47 is: 17,265.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,121.84 : 31,908.13 = 12,511.47 : x
  2. Step 2: Convert to fraction form
    23,121.84/31,908.13 = 12,511.47/x
  3. Step 3: Cross multiply
    23,121.84x = 31,908.13 × 12,511.47
  4. Step 4: Simplify right side
    23,121.84x = 399,217,611.25
  5. Step 5: Solve for x
    x = 399,217,611.25/23,121.84
  6. Step 6: Final answer
    x = 17,265.82

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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.