Home / 21,193.79-31,790.88-5,611.41

Finding the Fourth Proportional to 21,193.79, 31,790.88 and 5,611.41

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Solution

The fourth proportional to 21,193.79, 31,790.88 and 5,611.41 is: 8,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,193.79 : 31,790.88 = 5,611.41 : x
  2. Step 2: Convert to fraction form
    21,193.79/31,790.88 = 5,611.41/x
  3. Step 3: Cross multiply
    21,193.79x = 31,790.88 × 5,611.41
  4. Step 4: Simplify right side
    21,193.79x = 178,391,661.94
  5. Step 5: Solve for x
    x = 178,391,661.94/21,193.79
  6. Step 6: Final answer
    x = 8,417.17

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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.