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Finding the Fourth Proportional to 28,643.52, 42,948.02 and 12,845.69

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Solution

The fourth proportional to 28,643.52, 42,948.02 and 12,845.69 is: 19,260.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,643.52 : 42,948.02 = 12,845.69 : x
  2. Step 2: Convert to fraction form
    28,643.52/42,948.02 = 12,845.69/x
  3. Step 3: Cross multiply
    28,643.52x = 42,948.02 × 12,845.69
  4. Step 4: Simplify right side
    28,643.52x = 551,696,951.03
  5. Step 5: Solve for x
    x = 551,696,951.03/28,643.52
  6. Step 6: Final answer
    x = 19,260.79

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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.