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Finding the Fourth Proportional to 38,661.70, 53,352.93 and 21,893.62

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Solution

The fourth proportional to 38,661.70, 53,352.93 and 21,893.62 is: 30,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,661.70 : 53,352.93 = 21,893.62 : x
  2. Step 2: Convert to fraction form
    38,661.70/53,352.93 = 21,893.62/x
  3. Step 3: Cross multiply
    38,661.70x = 53,352.93 × 21,893.62
  4. Step 4: Simplify right side
    38,661.70x = 1,168,088,775.31
  5. Step 5: Solve for x
    x = 1,168,088,775.31/38,661.70
  6. Step 6: Final answer
    x = 30,213.07

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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.