Home / 11,356.42-15,669.46-6,639.79

Finding the Fourth Proportional to 11,356.42, 15,669.46 and 6,639.79

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Solution

The fourth proportional to 11,356.42, 15,669.46 and 6,639.79 is: 9,161.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,356.42 : 15,669.46 = 6,639.79 : x
  2. Step 2: Convert to fraction form
    11,356.42/15,669.46 = 6,639.79/x
  3. Step 3: Cross multiply
    11,356.42x = 15,669.46 × 6,639.79
  4. Step 4: Simplify right side
    11,356.42x = 104,041,923.81
  5. Step 5: Solve for x
    x = 104,041,923.81/11,356.42
  6. Step 6: Final answer
    x = 9,161.51

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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.