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Finding the Fourth Proportional to 39,706.59, 54,795.74 and 21,803.25

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Solution

The fourth proportional to 39,706.59, 54,795.74 and 21,803.25 is: 30,088.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,706.59 : 54,795.74 = 21,803.25 : x
  2. Step 2: Convert to fraction form
    39,706.59/54,795.74 = 21,803.25/x
  3. Step 3: Cross multiply
    39,706.59x = 54,795.74 × 21,803.25
  4. Step 4: Simplify right side
    39,706.59x = 1,194,725,109.14
  5. Step 5: Solve for x
    x = 1,194,725,109.14/39,706.59
  6. Step 6: Final answer
    x = 30,088.84

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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.