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Finding the Fourth Proportional to 15,793.77, 21,795.25 and 8,720.04

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Solution

The fourth proportional to 15,793.77, 21,795.25 and 8,720.04 is: 12,033.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,793.77 : 21,795.25 = 8,720.04 : x
  2. Step 2: Convert to fraction form
    15,793.77/21,795.25 = 8,720.04/x
  3. Step 3: Cross multiply
    15,793.77x = 21,795.25 × 8,720.04
  4. Step 4: Simplify right side
    15,793.77x = 190,055,451.81
  5. Step 5: Solve for x
    x = 190,055,451.81/15,793.77
  6. Step 6: Final answer
    x = 12,033.57

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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.