Home / 20,803.68-28,709.64-12,425.04

Finding the Fourth Proportional to 20,803.68, 28,709.64 and 12,425.04

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Solution

The fourth proportional to 20,803.68, 28,709.64 and 12,425.04 is: 17,146.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.68 : 28,709.64 = 12,425.04 : x
  2. Step 2: Convert to fraction form
    20,803.68/28,709.64 = 12,425.04/x
  3. Step 3: Cross multiply
    20,803.68x = 28,709.64 × 12,425.04
  4. Step 4: Simplify right side
    20,803.68x = 356,718,425.39
  5. Step 5: Solve for x
    x = 356,718,425.39/20,803.68
  6. Step 6: Final answer
    x = 17,146.89

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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.