Home / 28,198.99-38,902.09-18,125.55

Finding the Fourth Proportional to 28,198.99, 38,902.09 and 18,125.55

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Solution

The fourth proportional to 28,198.99, 38,902.09 and 18,125.55 is: 25,005.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,198.99 : 38,902.09 = 18,125.55 : x
  2. Step 2: Convert to fraction form
    28,198.99/38,902.09 = 18,125.55/x
  3. Step 3: Cross multiply
    28,198.99x = 38,902.09 × 18,125.55
  4. Step 4: Simplify right side
    28,198.99x = 705,121,777.40
  5. Step 5: Solve for x
    x = 705,121,777.40/28,198.99
  6. Step 6: Final answer
    x = 25,005.21

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Double scale
Find fourth proportional to 28,199.99, 38,903.47 and 18,126.55
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.