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Finding the Fourth Proportional to 38,983.87, 53,797.71 and 21,078.87

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Solution

The fourth proportional to 38,983.87, 53,797.71 and 21,078.87 is: 29,088.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,983.87 : 53,797.71 = 21,078.87 : x
  2. Step 2: Convert to fraction form
    38,983.87/53,797.71 = 21,078.87/x
  3. Step 3: Cross multiply
    38,983.87x = 53,797.71 × 21,078.87
  4. Step 4: Simplify right side
    38,983.87x = 1,133,994,935.39
  5. Step 5: Solve for x
    x = 1,133,994,935.39/38,983.87
  6. Step 6: Final answer
    x = 29,088.82

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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.