Home / 12,220.27-18,315.32-6,959.72

Finding the Fourth Proportional to 12,220.27, 18,315.32 and 6,959.72

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Solution

The fourth proportional to 12,220.27, 18,315.32 and 6,959.72 is: 10,430.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.27 : 18,315.32 = 6,959.72 : x
  2. Step 2: Convert to fraction form
    12,220.27/18,315.32 = 6,959.72/x
  3. Step 3: Cross multiply
    12,220.27x = 18,315.32 × 6,959.72
  4. Step 4: Simplify right side
    12,220.27x = 127,469,509.90
  5. Step 5: Solve for x
    x = 127,469,509.90/12,220.27
  6. Step 6: Final answer
    x = 10,430.99

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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.