Home / 28,196.92-38,912.36-15,621.72

Finding the Fourth Proportional to 28,196.92, 38,912.36 and 15,621.72

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Solution

The fourth proportional to 28,196.92, 38,912.36 and 15,621.72 is: 21,558.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,196.92 : 38,912.36 = 15,621.72 : x
  2. Step 2: Convert to fraction form
    28,196.92/38,912.36 = 15,621.72/x
  3. Step 3: Cross multiply
    28,196.92x = 38,912.36 × 15,621.72
  4. Step 4: Simplify right side
    28,196.92x = 607,877,992.46
  5. Step 5: Solve for x
    x = 607,877,992.46/28,196.92
  6. Step 6: Final answer
    x = 21,558.31

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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.