Home / 28,939.36-39,949.96-21,772.00

Finding the Fourth Proportional to 28,939.36, 39,949.96 and 21,772.00

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Solution

The fourth proportional to 28,939.36, 39,949.96 and 21,772.00 is: 30,055.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.36 : 39,949.96 = 21,772.00 : x
  2. Step 2: Convert to fraction form
    28,939.36/39,949.96 = 21,772.00/x
  3. Step 3: Cross multiply
    28,939.36x = 39,949.96 × 21,772.00
  4. Step 4: Simplify right side
    28,939.36x = 869,790,621.63
  5. Step 5: Solve for x
    x = 869,790,621.63/28,939.36
  6. Step 6: Final answer
    x = 30,055.62

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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.