Home / 21,987.22-30,344.34-12,558.82

Finding the Fourth Proportional to 21,987.22, 30,344.34 and 12,558.82

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Solution

The fourth proportional to 21,987.22, 30,344.34 and 12,558.82 is: 17,332.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.22 : 30,344.34 = 12,558.82 : x
  2. Step 2: Convert to fraction form
    21,987.22/30,344.34 = 12,558.82/x
  3. Step 3: Cross multiply
    21,987.22x = 30,344.34 × 12,558.82
  4. Step 4: Simplify right side
    21,987.22x = 381,089,104.08
  5. Step 5: Solve for x
    x = 381,089,104.08/21,987.22
  6. Step 6: Final answer
    x = 17,332.30

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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.