Home / 20,307.80-28,025.85-11,355.27

Finding the Fourth Proportional to 20,307.80, 28,025.85 and 11,355.27

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Solution

The fourth proportional to 20,307.80, 28,025.85 and 11,355.27 is: 15,670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.80 : 28,025.85 = 11,355.27 : x
  2. Step 2: Convert to fraction form
    20,307.80/28,025.85 = 11,355.27/x
  3. Step 3: Cross multiply
    20,307.80x = 28,025.85 × 11,355.27
  4. Step 4: Simplify right side
    20,307.80x = 318,241,093.73
  5. Step 5: Solve for x
    x = 318,241,093.73/20,307.80
  6. Step 6: Final answer
    x = 15,670.88

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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.