Home / 20,885.48-28,815.56-11,932.45

Finding the Fourth Proportional to 20,885.48, 28,815.56 and 11,932.45

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Solution

The fourth proportional to 20,885.48, 28,815.56 and 11,932.45 is: 16,463.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.48 : 28,815.56 = 11,932.45 : x
  2. Step 2: Convert to fraction form
    20,885.48/28,815.56 = 11,932.45/x
  3. Step 3: Cross multiply
    20,885.48x = 28,815.56 × 11,932.45
  4. Step 4: Simplify right side
    20,885.48x = 343,840,228.92
  5. Step 5: Solve for x
    x = 343,840,228.92/20,885.48
  6. Step 6: Final answer
    x = 16,463.12

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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.