Home / 38,987.52-53,801.56-21,991.51

Finding the Fourth Proportional to 38,987.52, 53,801.56 and 21,991.51

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Solution

The fourth proportional to 38,987.52, 53,801.56 and 21,991.51 is: 30,347.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.52 : 53,801.56 = 21,991.51 : x
  2. Step 2: Convert to fraction form
    38,987.52/53,801.56 = 21,991.51/x
  3. Step 3: Cross multiply
    38,987.52x = 53,801.56 × 21,991.51
  4. Step 4: Simplify right side
    38,987.52x = 1,183,177,639.50
  5. Step 5: Solve for x
    x = 1,183,177,639.50/38,987.52
  6. Step 6: Final answer
    x = 30,347.60

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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.