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Finding the Fourth Proportional to 20,751.78, 28,628.02 and 12,248.12

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Solution

The fourth proportional to 20,751.78, 28,628.02 and 12,248.12 is: 16,896.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.78 : 28,628.02 = 12,248.12 : x
  2. Step 2: Convert to fraction form
    20,751.78/28,628.02 = 12,248.12/x
  3. Step 3: Cross multiply
    20,751.78x = 28,628.02 × 12,248.12
  4. Step 4: Simplify right side
    20,751.78x = 350,639,424.32
  5. Step 5: Solve for x
    x = 350,639,424.32/20,751.78
  6. Step 6: Final answer
    x = 16,896.84

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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.