Home / 20,940.78-28,901.88-14,221.83

Finding the Fourth Proportional to 20,940.78, 28,901.88 and 14,221.83

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Solution

The fourth proportional to 20,940.78, 28,901.88 and 14,221.83 is: 19,628.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.78 : 28,901.88 = 14,221.83 : x
  2. Step 2: Convert to fraction form
    20,940.78/28,901.88 = 14,221.83/x
  3. Step 3: Cross multiply
    20,940.78x = 28,901.88 × 14,221.83
  4. Step 4: Simplify right side
    20,940.78x = 411,037,624.04
  5. Step 5: Solve for x
    x = 411,037,624.04/20,940.78
  6. Step 6: Final answer
    x = 19,628.57

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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.