Home / 20,915.53-28,863.45-11,355.41

Finding the Fourth Proportional to 20,915.53, 28,863.45 and 11,355.41

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Solution

The fourth proportional to 20,915.53, 28,863.45 and 11,355.41 is: 15,670.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.53 : 28,863.45 = 11,355.41 : x
  2. Step 2: Convert to fraction form
    20,915.53/28,863.45 = 11,355.41/x
  3. Step 3: Cross multiply
    20,915.53x = 28,863.45 × 11,355.41
  4. Step 4: Simplify right side
    20,915.53x = 327,756,308.76
  5. Step 5: Solve for x
    x = 327,756,308.76/20,915.53
  6. Step 6: Final answer
    x = 15,670.48

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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.