Home / 15,517.13-21,415.21-9,145.77

Finding the Fourth Proportional to 15,517.13, 21,415.21 and 9,145.77

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Solution

The fourth proportional to 15,517.13, 21,415.21 and 9,145.77 is: 12,622.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517.13 : 21,415.21 = 9,145.77 : x
  2. Step 2: Convert to fraction form
    15,517.13/21,415.21 = 9,145.77/x
  3. Step 3: Cross multiply
    15,517.13x = 21,415.21 × 9,145.77
  4. Step 4: Simplify right side
    15,517.13x = 195,858,585.16
  5. Step 5: Solve for x
    x = 195,858,585.16/15,517.13
  6. Step 6: Final answer
    x = 12,622.09

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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.