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Finding the Fourth Proportional to 43,511, 65,266.56 and 18,887

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Solution

The fourth proportional to 43,511, 65,266.56 and 18,887 is: 28,330.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,511 : 65,266.56 = 18,887 : x
  2. Step 2: Convert to fraction form
    43,511/65,266.56 = 18,887/x
  3. Step 3: Cross multiply
    43,511x = 65,266.56 × 18,887
  4. Step 4: Simplify right side
    43,511x = 1,232,689,518.72
  5. Step 5: Solve for x
    x = 1,232,689,518.72/43,511
  6. Step 6: Final answer
    x = 28,330.53

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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.