Home / 20,800.16-28,692.88-13,349.28

Finding the Fourth Proportional to 20,800.16, 28,692.88 and 13,349.28

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Solution

The fourth proportional to 20,800.16, 28,692.88 and 13,349.28 is: 18,414.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.16 : 28,692.88 = 13,349.28 : x
  2. Step 2: Convert to fraction form
    20,800.16/28,692.88 = 13,349.28/x
  3. Step 3: Cross multiply
    20,800.16x = 28,692.88 × 13,349.28
  4. Step 4: Simplify right side
    20,800.16x = 383,029,289.13
  5. Step 5: Solve for x
    x = 383,029,289.13/20,800.16
  6. Step 6: Final answer
    x = 18,414.73

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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.