Home / 20,418.27-28,180.34-12,465.15

Finding the Fourth Proportional to 20,418.27, 28,180.34 and 12,465.15

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Solution

The fourth proportional to 20,418.27, 28,180.34 and 12,465.15 is: 17,203.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.27 : 28,180.34 = 12,465.15 : x
  2. Step 2: Convert to fraction form
    20,418.27/28,180.34 = 12,465.15/x
  3. Step 3: Cross multiply
    20,418.27x = 28,180.34 × 12,465.15
  4. Step 4: Simplify right side
    20,418.27x = 351,272,165.15
  5. Step 5: Solve for x
    x = 351,272,165.15/20,418.27
  6. Step 6: Final answer
    x = 17,203.82

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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.