Home / 21,122.90-31,683.12-7,082.36

Finding the Fourth Proportional to 21,122.90, 31,683.12 and 7,082.36

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Solution

The fourth proportional to 21,122.90, 31,683.12 and 7,082.36 is: 10,623.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.90 : 31,683.12 = 7,082.36 : x
  2. Step 2: Convert to fraction form
    21,122.90/31,683.12 = 7,082.36/x
  3. Step 3: Cross multiply
    21,122.90x = 31,683.12 × 7,082.36
  4. Step 4: Simplify right side
    21,122.90x = 224,391,103.35
  5. Step 5: Solve for x
    x = 224,391,103.35/21,122.90
  6. Step 6: Final answer
    x = 10,623.12

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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.