Home / 21,167.08-31,728.40-7,122.23

Finding the Fourth Proportional to 21,167.08, 31,728.40 and 7,122.23

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Solution

The fourth proportional to 21,167.08, 31,728.40 and 7,122.23 is: 10,675.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.08 : 31,728.40 = 7,122.23 : x
  2. Step 2: Convert to fraction form
    21,167.08/31,728.40 = 7,122.23/x
  3. Step 3: Cross multiply
    21,167.08x = 31,728.40 × 7,122.23
  4. Step 4: Simplify right side
    21,167.08x = 225,977,028.70
  5. Step 5: Solve for x
    x = 225,977,028.70/21,167.08
  6. Step 6: Final answer
    x = 10,675.87

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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.