Home / 28,346.87-39,172.62-21,260.99

Finding the Fourth Proportional to 28,346.87, 39,172.62 and 21,260.99

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Solution

The fourth proportional to 28,346.87, 39,172.62 and 21,260.99 is: 29,380.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,346.87 : 39,172.62 = 21,260.99 : x
  2. Step 2: Convert to fraction form
    28,346.87/39,172.62 = 21,260.99/x
  3. Step 3: Cross multiply
    28,346.87x = 39,172.62 × 21,260.99
  4. Step 4: Simplify right side
    28,346.87x = 832,848,682.09
  5. Step 5: Solve for x
    x = 832,848,682.09/28,346.87
  6. Step 6: Final answer
    x = 29,380.62

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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.