Home / 38,919.47-53,705.67-21,918.29

Finding the Fourth Proportional to 38,919.47, 53,705.67 and 21,918.29

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Solution

The fourth proportional to 38,919.47, 53,705.67 and 21,918.29 is: 30,245.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,919.47 : 53,705.67 = 21,918.29 : x
  2. Step 2: Convert to fraction form
    38,919.47/53,705.67 = 21,918.29/x
  3. Step 3: Cross multiply
    38,919.47x = 53,705.67 × 21,918.29
  4. Step 4: Simplify right side
    38,919.47x = 1,177,136,181.18
  5. Step 5: Solve for x
    x = 1,177,136,181.18/38,919.47
  6. Step 6: Final answer
    x = 30,245.44

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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.