Home / 20,915.41-31,222.66-17,921.62

Finding the Fourth Proportional to 20,915.41, 31,222.66 and 17,921.62

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Solution

The fourth proportional to 20,915.41, 31,222.66 and 17,921.62 is: 26,753.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.41 : 31,222.66 = 17,921.62 : x
  2. Step 2: Convert to fraction form
    20,915.41/31,222.66 = 17,921.62/x
  3. Step 3: Cross multiply
    20,915.41x = 31,222.66 × 17,921.62
  4. Step 4: Simplify right side
    20,915.41x = 559,560,647.91
  5. Step 5: Solve for x
    x = 559,560,647.91/20,915.41
  6. Step 6: Final answer
    x = 26,753.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.