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Finding the Fourth Proportional to 21,999.38, 32,998.16 and 7,959.74

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Solution

The fourth proportional to 21,999.38, 32,998.16 and 7,959.74 is: 11,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.38 : 32,998.16 = 7,959.74 : x
  2. Step 2: Convert to fraction form
    21,999.38/32,998.16 = 7,959.74/x
  3. Step 3: Cross multiply
    21,999.38x = 32,998.16 × 7,959.74
  4. Step 4: Simplify right side
    21,999.38x = 262,656,628.99
  5. Step 5: Solve for x
    x = 262,656,628.99/21,999.38
  6. Step 6: Final answer
    x = 11,939.28

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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.