Home / 20,915.26-28,862.70-11,483.75

Finding the Fourth Proportional to 20,915.26, 28,862.70 and 11,483.75

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Solution

The fourth proportional to 20,915.26, 28,862.70 and 11,483.75 is: 15,847.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.26 : 28,862.70 = 11,483.75 : x
  2. Step 2: Convert to fraction form
    20,915.26/28,862.70 = 11,483.75/x
  3. Step 3: Cross multiply
    20,915.26x = 28,862.70 × 11,483.75
  4. Step 4: Simplify right side
    20,915.26x = 331,452,060.22
  5. Step 5: Solve for x
    x = 331,452,060.22/20,915.26
  6. Step 6: Final answer
    x = 15,847.38

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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.