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Finding the Fourth Proportional to 28,607.86, 42,916.38 and 8,881.79

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Solution

The fourth proportional to 28,607.86, 42,916.38 and 8,881.79 is: 13,324.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,607.86 : 42,916.38 = 8,881.79 : x
  2. Step 2: Convert to fraction form
    28,607.86/42,916.38 = 8,881.79/x
  3. Step 3: Cross multiply
    28,607.86x = 42,916.38 × 8,881.79
  4. Step 4: Simplify right side
    28,607.86x = 381,174,230.31
  5. Step 5: Solve for x
    x = 381,174,230.31/28,607.86
  6. Step 6: Final answer
    x = 13,324.11

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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.