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Finding the Fourth Proportional to 39,074.40, 58,568.40 and 21,556.80

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Solution

The fourth proportional to 39,074.40, 58,568.40 and 21,556.80 is: 32,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,074.40 : 58,568.40 = 21,556.80 : x
  2. Step 2: Convert to fraction form
    39,074.40/58,568.40 = 21,556.80/x
  3. Step 3: Cross multiply
    39,074.40x = 58,568.40 × 21,556.80
  4. Step 4: Simplify right side
    39,074.40x = 1,262,547,285.12
  5. Step 5: Solve for x
    x = 1,262,547,285.12/39,074.40
  6. Step 6: Final answer
    x = 32,311.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.