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Finding the Fourth Proportional to 19,290.76, 28,942.41 and 8,759.53

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Solution

The fourth proportional to 19,290.76, 28,942.41 and 8,759.53 is: 13,142.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,290.76 : 28,942.41 = 8,759.53 : x
  2. Step 2: Convert to fraction form
    19,290.76/28,942.41 = 8,759.53/x
  3. Step 3: Cross multiply
    19,290.76x = 28,942.41 × 8,759.53
  4. Step 4: Simplify right side
    19,290.76x = 253,521,908.67
  5. Step 5: Solve for x
    x = 253,521,908.67/19,290.76
  6. Step 6: Final answer
    x = 13,142.14

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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.