Home / 20,792.90-28,730.80-18,135.70

Finding the Fourth Proportional to 20,792.90, 28,730.80 and 18,135.70

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Solution

The fourth proportional to 20,792.90, 28,730.80 and 18,135.70 is: 25,059.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.90 : 28,730.80 = 18,135.70 : x
  2. Step 2: Convert to fraction form
    20,792.90/28,730.80 = 18,135.70/x
  3. Step 3: Cross multiply
    20,792.90x = 28,730.80 × 18,135.70
  4. Step 4: Simplify right side
    20,792.90x = 521,053,120.40
  5. Step 5: Solve for x
    x = 521,053,120.40/20,792.90
  6. Step 6: Final answer
    x = 25,059.18

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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.