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Finding the Fourth Proportional to 35,787.81, 49,391.74 and 21,640.76

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Solution

The fourth proportional to 35,787.81, 49,391.74 and 21,640.76 is: 29,867.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,787.81 : 49,391.74 = 21,640.76 : x
  2. Step 2: Convert to fraction form
    35,787.81/49,391.74 = 21,640.76/x
  3. Step 3: Cross multiply
    35,787.81x = 49,391.74 × 21,640.76
  4. Step 4: Simplify right side
    35,787.81x = 1,068,874,791.32
  5. Step 5: Solve for x
    x = 1,068,874,791.32/35,787.81
  6. Step 6: Final answer
    x = 29,867.01

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1.5x scale

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.