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Finding the Fourth Proportional to 28,643.92, 42,948.52 and 12,846

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Solution

The fourth proportional to 28,643.92, 42,948.52 and 12,846 is: 19,261.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,643.92 : 42,948.52 = 12,846 : x
  2. Step 2: Convert to fraction form
    28,643.92/42,948.52 = 12,846/x
  3. Step 3: Cross multiply
    28,643.92x = 42,948.52 × 12,846
  4. Step 4: Simplify right side
    28,643.92x = 551,716,687.92
  5. Step 5: Solve for x
    x = 551,716,687.92/28,643.92
  6. Step 6: Final answer
    x = 19,261.21

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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.