Home / 15,517.12-21,415.24-9,145.72

Finding the Fourth Proportional to 15,517.12, 21,415.24 and 9,145.72

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Solution

The fourth proportional to 15,517.12, 21,415.24 and 9,145.72 is: 12,622.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517.12 : 21,415.24 = 9,145.72 : x
  2. Step 2: Convert to fraction form
    15,517.12/21,415.24 = 9,145.72/x
  3. Step 3: Cross multiply
    15,517.12x = 21,415.24 × 9,145.72
  4. Step 4: Simplify right side
    15,517.12x = 195,857,788.77
  5. Step 5: Solve for x
    x = 195,857,788.77/15,517.12
  6. Step 6: Final answer
    x = 12,622.05

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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.