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Finding the Fourth Proportional to 38,904.94, 53,684.94 and 21,908.71

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Solution

The fourth proportional to 38,904.94, 53,684.94 and 21,908.71 is: 30,231.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,904.94 : 53,684.94 = 21,908.71 : x
  2. Step 2: Convert to fraction form
    38,904.94/53,684.94 = 21,908.71/x
  3. Step 3: Cross multiply
    38,904.94x = 53,684.94 × 21,908.71
  4. Step 4: Simplify right side
    38,904.94x = 1,176,167,781.83
  5. Step 5: Solve for x
    x = 1,176,167,781.83/38,904.94
  6. Step 6: Final answer
    x = 30,231.84

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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.