Home / 11,115.40-16,654.58-7,821.57

Finding the Fourth Proportional to 11,115.40, 16,654.58 and 7,821.57

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Solution

The fourth proportional to 11,115.40, 16,654.58 and 7,821.57 is: 11,719.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.40 : 16,654.58 = 7,821.57 : x
  2. Step 2: Convert to fraction form
    11,115.40/16,654.58 = 7,821.57/x
  3. Step 3: Cross multiply
    11,115.40x = 16,654.58 × 7,821.57
  4. Step 4: Simplify right side
    11,115.40x = 130,264,982.84
  5. Step 5: Solve for x
    x = 130,264,982.84/11,115.40
  6. Step 6: Final answer
    x = 11,719.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.