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Finding the Fourth Proportional to 18,791.22, 28,148.56 and 8,900.51

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Solution

The fourth proportional to 18,791.22, 28,148.56 and 8,900.51 is: 13,332.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.22 : 28,148.56 = 8,900.51 : x
  2. Step 2: Convert to fraction form
    18,791.22/28,148.56 = 8,900.51/x
  3. Step 3: Cross multiply
    18,791.22x = 28,148.56 × 8,900.51
  4. Step 4: Simplify right side
    18,791.22x = 250,536,587.89
  5. Step 5: Solve for x
    x = 250,536,587.89/18,791.22
  6. Step 6: Final answer
    x = 13,332.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.