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Finding the Fourth Proportional to 39,236, 54,145.68 and 21,572

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Solution

The fourth proportional to 39,236, 54,145.68 and 21,572 is: 29,769.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,236 : 54,145.68 = 21,572 : x
  2. Step 2: Convert to fraction form
    39,236/54,145.68 = 21,572/x
  3. Step 3: Cross multiply
    39,236x = 54,145.68 × 21,572
  4. Step 4: Simplify right side
    39,236x = 1,168,030,608.96
  5. Step 5: Solve for x
    x = 1,168,030,608.96/39,236
  6. Step 6: Final answer
    x = 29,769.36

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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.