Home / 21,987.74-30,343.66-12,556.10

Finding the Fourth Proportional to 21,987.74, 30,343.66 and 12,556.10

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Solution

The fourth proportional to 21,987.74, 30,343.66 and 12,556.10 is: 17,327.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.74 : 30,343.66 = 12,556.10 : x
  2. Step 2: Convert to fraction form
    21,987.74/30,343.66 = 12,556.10/x
  3. Step 3: Cross multiply
    21,987.74x = 30,343.66 × 12,556.10
  4. Step 4: Simplify right side
    21,987.74x = 380,998,029.33
  5. Step 5: Solve for x
    x = 380,998,029.33/21,987.74
  6. Step 6: Final answer
    x = 17,327.75

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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.