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Finding the Fourth Proportional to 28,035.45, 42,045.99 and 8,309.40

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Solution

The fourth proportional to 28,035.45, 42,045.99 and 8,309.40 is: 12,461.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,035.45 : 42,045.99 = 8,309.40 : x
  2. Step 2: Convert to fraction form
    28,035.45/42,045.99 = 8,309.40/x
  3. Step 3: Cross multiply
    28,035.45x = 42,045.99 × 8,309.40
  4. Step 4: Simplify right side
    28,035.45x = 349,376,949.31
  5. Step 5: Solve for x
    x = 349,376,949.31/28,035.45
  6. Step 6: Final answer
    x = 12,461.97

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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.