Home / 20,551.81-28,361.63-11,599.69

Finding the Fourth Proportional to 20,551.81, 28,361.63 and 11,599.69

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Solution

The fourth proportional to 20,551.81, 28,361.63 and 11,599.69 is: 16,007.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.81 : 28,361.63 = 11,599.69 : x
  2. Step 2: Convert to fraction form
    20,551.81/28,361.63 = 11,599.69/x
  3. Step 3: Cross multiply
    20,551.81x = 28,361.63 × 11,599.69
  4. Step 4: Simplify right side
    20,551.81x = 328,986,115.89
  5. Step 5: Solve for x
    x = 328,986,115.89/20,551.81
  6. Step 6: Final answer
    x = 16,007.65

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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.