Home / 13,521.83-20,268.36-7,977.78

Finding the Fourth Proportional to 13,521.83, 20,268.36 and 7,977.78

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Solution

The fourth proportional to 13,521.83, 20,268.36 and 7,977.78 is: 11,958.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.83 : 20,268.36 = 7,977.78 : x
  2. Step 2: Convert to fraction form
    13,521.83/20,268.36 = 7,977.78/x
  3. Step 3: Cross multiply
    13,521.83x = 20,268.36 × 7,977.78
  4. Step 4: Simplify right side
    13,521.83x = 161,696,517.04
  5. Step 5: Solve for x
    x = 161,696,517.04/13,521.83
  6. Step 6: Final answer
    x = 11,958.19

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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.