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Finding the Fourth Proportional to 28,543.21, 42,818.92 and 8,823.30

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Solution

The fourth proportional to 28,543.21, 42,818.92 and 8,823.30 is: 13,236.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,543.21 : 42,818.92 = 8,823.30 : x
  2. Step 2: Convert to fraction form
    28,543.21/42,818.92 = 8,823.30/x
  3. Step 3: Cross multiply
    28,543.21x = 42,818.92 × 8,823.30
  4. Step 4: Simplify right side
    28,543.21x = 377,804,343.08
  5. Step 5: Solve for x
    x = 377,804,343.08/28,543.21
  6. Step 6: Final answer
    x = 13,236.22

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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.