Home / 20,181.32-27,888.63-15,136.79

Finding the Fourth Proportional to 20,181.32, 27,888.63 and 15,136.79

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Solution

The fourth proportional to 20,181.32, 27,888.63 and 15,136.79 is: 20,917.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,181.32 : 27,888.63 = 15,136.79 : x
  2. Step 2: Convert to fraction form
    20,181.32/27,888.63 = 15,136.79/x
  3. Step 3: Cross multiply
    20,181.32x = 27,888.63 × 15,136.79
  4. Step 4: Simplify right side
    20,181.32x = 422,144,196.25
  5. Step 5: Solve for x
    x = 422,144,196.25/20,181.32
  6. Step 6: Final answer
    x = 20,917.58

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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.