Home / 39,459.38-54,453.62-21,554.39

Finding the Fourth Proportional to 39,459.38, 54,453.62 and 21,554.39

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Solution

The fourth proportional to 39,459.38, 54,453.62 and 21,554.39 is: 29,744.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,459.38 : 54,453.62 = 21,554.39 : x
  2. Step 2: Convert to fraction form
    39,459.38/54,453.62 = 21,554.39/x
  3. Step 3: Cross multiply
    39,459.38x = 54,453.62 × 21,554.39
  4. Step 4: Simplify right side
    39,459.38x = 1,173,714,182.35
  5. Step 5: Solve for x
    x = 1,173,714,182.35/39,459.38
  6. Step 6: Final answer
    x = 29,744.88

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Double scale
Find fourth proportional to 39,460.38, 54,454.99 and 21,555.39
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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.