Home / 18,967.21-28,427.77-13,422.18

Finding the Fourth Proportional to 18,967.21, 28,427.77 and 13,422.18

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Solution

The fourth proportional to 18,967.21, 28,427.77 and 13,422.18 is: 20,116.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.21 : 28,427.77 = 13,422.18 : x
  2. Step 2: Convert to fraction form
    18,967.21/28,427.77 = 13,422.18/x
  3. Step 3: Cross multiply
    18,967.21x = 28,427.77 × 13,422.18
  4. Step 4: Simplify right side
    18,967.21x = 381,562,645.94
  5. Step 5: Solve for x
    x = 381,562,645.94/18,967.21
  6. Step 6: Final answer
    x = 20,116.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.