Home / 20,915.03-28,862.76-11,354.91

Finding the Fourth Proportional to 20,915.03, 28,862.76 and 11,354.91

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Solution

The fourth proportional to 20,915.03, 28,862.76 and 11,354.91 is: 15,669.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.03 : 28,862.76 = 11,354.91 : x
  2. Step 2: Convert to fraction form
    20,915.03/28,862.76 = 11,354.91/x
  3. Step 3: Cross multiply
    20,915.03x = 28,862.76 × 11,354.91
  4. Step 4: Simplify right side
    20,915.03x = 327,734,042.15
  5. Step 5: Solve for x
    x = 327,734,042.15/20,915.03
  6. Step 6: Final answer
    x = 15,669.79

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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.