Home / 21,123.70-31,683.90-5,540.92

Finding the Fourth Proportional to 21,123.70, 31,683.90 and 5,540.92

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Solution

The fourth proportional to 21,123.70, 31,683.90 and 5,540.92 is: 8,310.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.70 : 31,683.90 = 5,540.92 : x
  2. Step 2: Convert to fraction form
    21,123.70/31,683.90 = 5,540.92/x
  3. Step 3: Cross multiply
    21,123.70x = 31,683.90 × 5,540.92
  4. Step 4: Simplify right side
    21,123.70x = 175,557,955.19
  5. Step 5: Solve for x
    x = 175,557,955.19/21,123.70
  6. Step 6: Final answer
    x = 8,310.95

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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.