Home / 20,800.02-28,709.92-12,305.10

Finding the Fourth Proportional to 20,800.02, 28,709.92 and 12,305.10

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Solution

The fourth proportional to 20,800.02, 28,709.92 and 12,305.10 is: 16,984.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.02 : 28,709.92 = 12,305.10 : x
  2. Step 2: Convert to fraction form
    20,800.02/28,709.92 = 12,305.10/x
  3. Step 3: Cross multiply
    20,800.02x = 28,709.92 × 12,305.10
  4. Step 4: Simplify right side
    20,800.02x = 353,278,436.59
  5. Step 5: Solve for x
    x = 353,278,436.59/20,800.02
  6. Step 6: Final answer
    x = 16,984.52

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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.