Home / 38,991.78-53,808.60-21,996.01

Finding the Fourth Proportional to 38,991.78, 53,808.60 and 21,996.01

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Solution

The fourth proportional to 38,991.78, 53,808.60 and 21,996.01 is: 30,354.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,991.78 : 53,808.60 = 21,996.01 : x
  2. Step 2: Convert to fraction form
    38,991.78/53,808.60 = 21,996.01/x
  3. Step 3: Cross multiply
    38,991.78x = 53,808.60 × 21,996.01
  4. Step 4: Simplify right side
    38,991.78x = 1,183,574,350.76
  5. Step 5: Solve for x
    x = 1,183,574,350.76/38,991.78
  6. Step 6: Final answer
    x = 30,354.46

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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.