Home / 38,987.46-53,801.48-21,991.45

Finding the Fourth Proportional to 38,987.46, 53,801.48 and 21,991.45

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Solution

The fourth proportional to 38,987.46, 53,801.48 and 21,991.45 is: 30,347.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.46 : 53,801.48 = 21,991.45 : x
  2. Step 2: Convert to fraction form
    38,987.46/53,801.48 = 21,991.45/x
  3. Step 3: Cross multiply
    38,987.46x = 53,801.48 × 21,991.45
  4. Step 4: Simplify right side
    38,987.46x = 1,183,172,447.39
  5. Step 5: Solve for x
    x = 1,183,172,447.39/38,987.46
  6. Step 6: Final answer
    x = 30,347.52

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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.