Home / 20,768.96-28,692.41-13,615.85

Finding the Fourth Proportional to 20,768.96, 28,692.41 and 13,615.85

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Solution

The fourth proportional to 20,768.96, 28,692.41 and 13,615.85 is: 18,810.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.96 : 28,692.41 = 13,615.85 : x
  2. Step 2: Convert to fraction form
    20,768.96/28,692.41 = 13,615.85/x
  3. Step 3: Cross multiply
    20,768.96x = 28,692.41 × 13,615.85
  4. Step 4: Simplify right side
    20,768.96x = 390,671,339.16
  5. Step 5: Solve for x
    x = 390,671,339.16/20,768.96
  6. Step 6: Final answer
    x = 18,810.35

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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.