Home / 28,199.68-38,912.56-15,623.20

Finding the Fourth Proportional to 28,199.68, 38,912.56 and 15,623.20

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Solution

The fourth proportional to 28,199.68, 38,912.56 and 15,623.20 is: 21,558.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,199.68 : 38,912.56 = 15,623.20 : x
  2. Step 2: Convert to fraction form
    28,199.68/38,912.56 = 15,623.20/x
  3. Step 3: Cross multiply
    28,199.68x = 38,912.56 × 15,623.20
  4. Step 4: Simplify right side
    28,199.68x = 607,938,707.39
  5. Step 5: Solve for x
    x = 607,938,707.39/28,199.68
  6. Step 6: Final answer
    x = 21,558.35

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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.