Home / 20,143.15-30,012.32-19,011.38

Finding the Fourth Proportional to 20,143.15, 30,012.32 and 19,011.38

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Solution

The fourth proportional to 20,143.15, 30,012.32 and 19,011.38 is: 28,326.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.15 : 30,012.32 = 19,011.38 : x
  2. Step 2: Convert to fraction form
    20,143.15/30,012.32 = 19,011.38/x
  3. Step 3: Cross multiply
    20,143.15x = 30,012.32 × 19,011.38
  4. Step 4: Simplify right side
    20,143.15x = 570,575,517.67
  5. Step 5: Solve for x
    x = 570,575,517.67/20,143.15
  6. Step 6: Final answer
    x = 28,326.04

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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.