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Finding the Fourth Proportional to 38,881.92, 53,662.22 and 21,889.50

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Solution

The fourth proportional to 38,881.92, 53,662.22 and 21,889.50 is: 30,210.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,881.92 : 53,662.22 = 21,889.50 : x
  2. Step 2: Convert to fraction form
    38,881.92/53,662.22 = 21,889.50/x
  3. Step 3: Cross multiply
    38,881.92x = 53,662.22 × 21,889.50
  4. Step 4: Simplify right side
    38,881.92x = 1,174,639,055.24
  5. Step 5: Solve for x
    x = 1,174,639,055.24/38,881.92
  6. Step 6: Final answer
    x = 30,210.42

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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.