Home / 28,196.25-38,912.10-15,621

Finding the Fourth Proportional to 28,196.25, 38,912.10 and 15,621

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Solution

The fourth proportional to 28,196.25, 38,912.10 and 15,621 is: 21,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,196.25 : 38,912.10 = 15,621 : x
  2. Step 2: Convert to fraction form
    28,196.25/38,912.10 = 15,621/x
  3. Step 3: Cross multiply
    28,196.25x = 38,912.10 × 15,621
  4. Step 4: Simplify right side
    28,196.25x = 607,845,914.10
  5. Step 5: Solve for x
    x = 607,845,914.10/28,196.25
  6. Step 6: Final answer
    x = 21,557.69

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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.