Home / 21,571.53-32,129.39-20,611.77

Finding the Fourth Proportional to 21,571.53, 32,129.39 and 20,611.77

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Solution

The fourth proportional to 21,571.53, 32,129.39 and 20,611.77 is: 30,699.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,571.53 : 32,129.39 = 20,611.77 : x
  2. Step 2: Convert to fraction form
    21,571.53/32,129.39 = 20,611.77/x
  3. Step 3: Cross multiply
    21,571.53x = 32,129.39 × 20,611.77
  4. Step 4: Simplify right side
    21,571.53x = 662,243,596.92
  5. Step 5: Solve for x
    x = 662,243,596.92/21,571.53
  6. Step 6: Final answer
    x = 30,699.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.