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Finding the Fourth Proportional to 28,607.81, 42,916.67 and 9,630.64

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Solution

The fourth proportional to 28,607.81, 42,916.67 and 9,630.64 is: 14,447.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,607.81 : 42,916.67 = 9,630.64 : x
  2. Step 2: Convert to fraction form
    28,607.81/42,916.67 = 9,630.64/x
  3. Step 3: Cross multiply
    28,607.81x = 42,916.67 × 9,630.64
  4. Step 4: Simplify right side
    28,607.81x = 413,314,736.03
  5. Step 5: Solve for x
    x = 413,314,736.03/28,607.81
  6. Step 6: Final answer
    x = 14,447.62

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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.