Home / 20,915.32-28,863.24-11,483.88

Finding the Fourth Proportional to 20,915.32, 28,863.24 and 11,483.88

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Solution

The fourth proportional to 20,915.32, 28,863.24 and 11,483.88 is: 15,847.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.32 : 28,863.24 = 11,483.88 : x
  2. Step 2: Convert to fraction form
    20,915.32/28,863.24 = 11,483.88/x
  3. Step 3: Cross multiply
    20,915.32x = 28,863.24 × 11,483.88
  4. Step 4: Simplify right side
    20,915.32x = 331,461,984.57
  5. Step 5: Solve for x
    x = 331,461,984.57/20,915.32
  6. Step 6: Final answer
    x = 15,847.81

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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.