Home / 20,515.50-30,612.22-19,261.62

Finding the Fourth Proportional to 20,515.50, 30,612.22 and 19,261.62

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Solution

The fourth proportional to 20,515.50, 30,612.22 and 19,261.62 is: 28,741.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.50 : 30,612.22 = 19,261.62 : x
  2. Step 2: Convert to fraction form
    20,515.50/30,612.22 = 19,261.62/x
  3. Step 3: Cross multiply
    20,515.50x = 30,612.22 × 19,261.62
  4. Step 4: Simplify right side
    20,515.50x = 589,640,949.00
  5. Step 5: Solve for x
    x = 589,640,949.00/20,515.50
  6. Step 6: Final answer
    x = 28,741.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.