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Finding the Fourth Proportional to 39,702.92, 54,787.02 and 21,795.08

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Solution

The fourth proportional to 39,702.92, 54,787.02 and 21,795.08 is: 30,075.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,702.92 : 54,787.02 = 21,795.08 : x
  2. Step 2: Convert to fraction form
    39,702.92/54,787.02 = 21,795.08/x
  3. Step 3: Cross multiply
    39,702.92x = 54,787.02 × 21,795.08
  4. Step 4: Simplify right side
    39,702.92x = 1,194,087,483.86
  5. Step 5: Solve for x
    x = 1,194,087,483.86/39,702.92
  6. Step 6: Final answer
    x = 30,075.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.