Home / 21,039.72-31,571.64-8,557.44

Finding the Fourth Proportional to 21,039.72, 31,571.64 and 8,557.44

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Solution

The fourth proportional to 21,039.72, 31,571.64 and 8,557.44 is: 12,841.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.72 : 31,571.64 = 8,557.44 : x
  2. Step 2: Convert to fraction form
    21,039.72/31,571.64 = 8,557.44/x
  3. Step 3: Cross multiply
    21,039.72x = 31,571.64 × 8,557.44
  4. Step 4: Simplify right side
    21,039.72x = 270,172,415.00
  5. Step 5: Solve for x
    x = 270,172,415.00/21,039.72
  6. Step 6: Final answer
    x = 12,841.07

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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.