Home / 20,907.15-31,366.19-12,133.63

Finding the Fourth Proportional to 20,907.15, 31,366.19 and 12,133.63

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Solution

The fourth proportional to 20,907.15, 31,366.19 and 12,133.63 is: 18,203.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.15 : 31,366.19 = 12,133.63 : x
  2. Step 2: Convert to fraction form
    20,907.15/31,366.19 = 12,133.63/x
  3. Step 3: Cross multiply
    20,907.15x = 31,366.19 × 12,133.63
  4. Step 4: Simplify right side
    20,907.15x = 380,585,743.97
  5. Step 5: Solve for x
    x = 380,585,743.97/20,907.15
  6. Step 6: Final answer
    x = 18,203.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.