Home / 38,987.23-53,801.17-21,991.23

Finding the Fourth Proportional to 38,987.23, 53,801.17 and 21,991.23

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Solution

The fourth proportional to 38,987.23, 53,801.17 and 21,991.23 is: 30,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.23 : 53,801.17 = 21,991.23 : x
  2. Step 2: Convert to fraction form
    38,987.23/53,801.17 = 21,991.23/x
  3. Step 3: Cross multiply
    38,987.23x = 53,801.17 × 21,991.23
  4. Step 4: Simplify right side
    38,987.23x = 1,183,153,910.61
  5. Step 5: Solve for x
    x = 1,183,153,910.61/38,987.23
  6. Step 6: Final answer
    x = 30,347.21

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Double scale
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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.