Home / 21,114.72-31,675.32-7,966.80

Finding the Fourth Proportional to 21,114.72, 31,675.32 and 7,966.80

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Solution

The fourth proportional to 21,114.72, 31,675.32 and 7,966.80 is: 11,951.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.72 : 31,675.32 = 7,966.80 : x
  2. Step 2: Convert to fraction form
    21,114.72/31,675.32 = 7,966.80/x
  3. Step 3: Cross multiply
    21,114.72x = 31,675.32 × 7,966.80
  4. Step 4: Simplify right side
    21,114.72x = 252,350,939.38
  5. Step 5: Solve for x
    x = 252,350,939.38/21,114.72
  6. Step 6: Final answer
    x = 11,951.42

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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.