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Finding the Fourth Proportional to 39,792.17, 54,914.09 and 21,888.09

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Solution

The fourth proportional to 39,792.17, 54,914.09 and 21,888.09 is: 30,206.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,792.17 : 54,914.09 = 21,888.09 : x
  2. Step 2: Convert to fraction form
    39,792.17/54,914.09 = 21,888.09/x
  3. Step 3: Cross multiply
    39,792.17x = 54,914.09 × 21,888.09
  4. Step 4: Simplify right side
    39,792.17x = 1,201,964,434.75
  5. Step 5: Solve for x
    x = 1,201,964,434.75/39,792.17
  6. Step 6: Final answer
    x = 30,206.05

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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.