Home / 13,621.98-18,804.09-8,318.70

Finding the Fourth Proportional to 13,621.98, 18,804.09 and 8,318.70

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Solution

The fourth proportional to 13,621.98, 18,804.09 and 8,318.70 is: 11,483.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.98 : 18,804.09 = 8,318.70 : x
  2. Step 2: Convert to fraction form
    13,621.98/18,804.09 = 8,318.70/x
  3. Step 3: Cross multiply
    13,621.98x = 18,804.09 × 8,318.70
  4. Step 4: Simplify right side
    13,621.98x = 156,425,583.48
  5. Step 5: Solve for x
    x = 156,425,583.48/13,621.98
  6. Step 6: Final answer
    x = 11,483.32

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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.