Home / 38,987.01-53,802.69-21,991.59

Finding the Fourth Proportional to 38,987.01, 53,802.69 and 21,991.59

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Solution

The fourth proportional to 38,987.01, 53,802.69 and 21,991.59 is: 30,348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.01 : 53,802.69 = 21,991.59 : x
  2. Step 2: Convert to fraction form
    38,987.01/53,802.69 = 21,991.59/x
  3. Step 3: Cross multiply
    38,987.01x = 53,802.69 × 21,991.59
  4. Step 4: Simplify right side
    38,987.01x = 1,183,206,375.38
  5. Step 5: Solve for x
    x = 1,183,206,375.38/38,987.01
  6. Step 6: Final answer
    x = 30,348.74

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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.