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Finding the Fourth Proportional to 28,970.92, 39,978.66 and 16,396.36

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Solution

The fourth proportional to 28,970.92, 39,978.66 and 16,396.36 is: 22,626.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,970.92 : 39,978.66 = 16,396.36 : x
  2. Step 2: Convert to fraction form
    28,970.92/39,978.66 = 16,396.36/x
  3. Step 3: Cross multiply
    28,970.92x = 39,978.66 × 16,396.36
  4. Step 4: Simplify right side
    28,970.92x = 655,504,501.68
  5. Step 5: Solve for x
    x = 655,504,501.68/28,970.92
  6. Step 6: Final answer
    x = 22,626.29

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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.