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Finding the Fourth Proportional to 28,455.98, 42,688.98 and 9,731.62

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Solution

The fourth proportional to 28,455.98, 42,688.98 and 9,731.62 is: 14,599.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.98 : 42,688.98 = 9,731.62 : x
  2. Step 2: Convert to fraction form
    28,455.98/42,688.98 = 9,731.62/x
  3. Step 3: Cross multiply
    28,455.98x = 42,688.98 × 9,731.62
  4. Step 4: Simplify right side
    28,455.98x = 415,432,718.10
  5. Step 5: Solve for x
    x = 415,432,718.10/28,455.98
  6. Step 6: Final answer
    x = 14,599.14

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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.