Home / 20,938.26-28,893.85-12,981.23

Finding the Fourth Proportional to 20,938.26, 28,893.85 and 12,981.23

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Solution

The fourth proportional to 20,938.26, 28,893.85 and 12,981.23 is: 17,913.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.26 : 28,893.85 = 12,981.23 : x
  2. Step 2: Convert to fraction form
    20,938.26/28,893.85 = 12,981.23/x
  3. Step 3: Cross multiply
    20,938.26x = 28,893.85 × 12,981.23
  4. Step 4: Simplify right side
    20,938.26x = 375,077,712.44
  5. Step 5: Solve for x
    x = 375,077,712.44/20,938.26
  6. Step 6: Final answer
    x = 17,913.51

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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.