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Finding the Fourth Proportional to 18,791.47, 28,148.93 and 8,900.76

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Solution

The fourth proportional to 18,791.47, 28,148.93 and 8,900.76 is: 13,333.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.47 : 28,148.93 = 8,900.76 : x
  2. Step 2: Convert to fraction form
    18,791.47/28,148.93 = 8,900.76/x
  3. Step 3: Cross multiply
    18,791.47x = 28,148.93 × 8,900.76
  4. Step 4: Simplify right side
    18,791.47x = 250,546,870.19
  5. Step 5: Solve for x
    x = 250,546,870.19/18,791.47
  6. Step 6: Final answer
    x = 13,333.01

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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.