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Finding the Fourth Proportional to 12,640.98, 18,950.52 and 6,790.74

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Solution

The fourth proportional to 12,640.98, 18,950.52 and 6,790.74 is: 10,180.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.98 : 18,950.52 = 6,790.74 : x
  2. Step 2: Convert to fraction form
    12,640.98/18,950.52 = 6,790.74/x
  3. Step 3: Cross multiply
    12,640.98x = 18,950.52 × 6,790.74
  4. Step 4: Simplify right side
    12,640.98x = 128,688,054.18
  5. Step 5: Solve for x
    x = 128,688,054.18/12,640.98
  6. Step 6: Final answer
    x = 10,180.23

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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.