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Finding the Fourth Proportional to 28,530.63, 42,806.10 and 12,734.22

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Solution

The fourth proportional to 28,530.63, 42,806.10 and 12,734.22 is: 19,105.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.63 : 42,806.10 = 12,734.22 : x
  2. Step 2: Convert to fraction form
    28,530.63/42,806.10 = 12,734.22/x
  3. Step 3: Cross multiply
    28,530.63x = 42,806.10 × 12,734.22
  4. Step 4: Simplify right side
    28,530.63x = 545,102,294.74
  5. Step 5: Solve for x
    x = 545,102,294.74/28,530.63
  6. Step 6: Final answer
    x = 19,105.86

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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.