Home / 20,635.94-28,479.32-12,680.93

Finding the Fourth Proportional to 20,635.94, 28,479.32 and 12,680.93

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Solution

The fourth proportional to 20,635.94, 28,479.32 and 12,680.93 is: 17,500.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.94 : 28,479.32 = 12,680.93 : x
  2. Step 2: Convert to fraction form
    20,635.94/28,479.32 = 12,680.93/x
  3. Step 3: Cross multiply
    20,635.94x = 28,479.32 × 12,680.93
  4. Step 4: Simplify right side
    20,635.94x = 361,144,263.37
  5. Step 5: Solve for x
    x = 361,144,263.37/20,635.94
  6. Step 6: Final answer
    x = 17,500.74

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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.