Home / 20,953.32-28,915.98-11,521.82

Finding the Fourth Proportional to 20,953.32, 28,915.98 and 11,521.82

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Solution

The fourth proportional to 20,953.32, 28,915.98 and 11,521.82 is: 15,900.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.32 : 28,915.98 = 11,521.82 : x
  2. Step 2: Convert to fraction form
    20,953.32/28,915.98 = 11,521.82/x
  3. Step 3: Cross multiply
    20,953.32x = 28,915.98 × 11,521.82
  4. Step 4: Simplify right side
    20,953.32x = 333,164,716.68
  5. Step 5: Solve for x
    x = 333,164,716.68/20,953.32
  6. Step 6: Final answer
    x = 15,900.33

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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.