Home / 12,639.66-18,950.85-6,790.38

Finding the Fourth Proportional to 12,639.66, 18,950.85 and 6,790.38

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Solution

The fourth proportional to 12,639.66, 18,950.85 and 6,790.38 is: 10,180.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.66 : 18,950.85 = 6,790.38 : x
  2. Step 2: Convert to fraction form
    12,639.66/18,950.85 = 6,790.38/x
  3. Step 3: Cross multiply
    12,639.66x = 18,950.85 × 6,790.38
  4. Step 4: Simplify right side
    12,639.66x = 128,683,472.82
  5. Step 5: Solve for x
    x = 128,683,472.82/12,639.66
  6. Step 6: Final answer
    x = 10,180.93

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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.