Home / 18,982.34-28,457.31-13,418.18

Finding the Fourth Proportional to 18,982.34, 28,457.31 and 13,418.18

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Solution

The fourth proportional to 18,982.34, 28,457.31 and 13,418.18 is: 20,115.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982.34 : 28,457.31 = 13,418.18 : x
  2. Step 2: Convert to fraction form
    18,982.34/28,457.31 = 13,418.18/x
  3. Step 3: Cross multiply
    18,982.34x = 28,457.31 × 13,418.18
  4. Step 4: Simplify right side
    18,982.34x = 381,845,307.90
  5. Step 5: Solve for x
    x = 381,845,307.90/18,982.34
  6. Step 6: Final answer
    x = 20,115.82

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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.