Home / 20,915.70-28,862.37-19,243.86

Finding the Fourth Proportional to 20,915.70, 28,862.37 and 19,243.86

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Solution

The fourth proportional to 20,915.70, 28,862.37 and 19,243.86 is: 26,555.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.70 : 28,862.37 = 19,243.86 : x
  2. Step 2: Convert to fraction form
    20,915.70/28,862.37 = 19,243.86/x
  3. Step 3: Cross multiply
    20,915.70x = 28,862.37 × 19,243.86
  4. Step 4: Simplify right side
    20,915.70x = 555,423,407.55
  5. Step 5: Solve for x
    x = 555,423,407.55/20,915.70
  6. Step 6: Final answer
    x = 26,555.33

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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.