Home / 20,382.37-28,127.95-12,314.90

Finding the Fourth Proportional to 20,382.37, 28,127.95 and 12,314.90

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Solution

The fourth proportional to 20,382.37, 28,127.95 and 12,314.90 is: 16,994.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.37 : 28,127.95 = 12,314.90 : x
  2. Step 2: Convert to fraction form
    20,382.37/28,127.95 = 12,314.90/x
  3. Step 3: Cross multiply
    20,382.37x = 28,127.95 × 12,314.90
  4. Step 4: Simplify right side
    20,382.37x = 346,392,872.94
  5. Step 5: Solve for x
    x = 346,392,872.94/20,382.37
  6. Step 6: Final answer
    x = 16,994.73

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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.