Home / 13,321.80-19,980.81-4,555.44

Finding the Fourth Proportional to 13,321.80, 19,980.81 and 4,555.44

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Solution

The fourth proportional to 13,321.80, 19,980.81 and 4,555.44 is: 6,832.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.80 : 19,980.81 = 4,555.44 : x
  2. Step 2: Convert to fraction form
    13,321.80/19,980.81 = 4,555.44/x
  3. Step 3: Cross multiply
    13,321.80x = 19,980.81 × 4,555.44
  4. Step 4: Simplify right side
    13,321.80x = 91,021,381.11
  5. Step 5: Solve for x
    x = 91,021,381.11/13,321.80
  6. Step 6: Final answer
    x = 6,832.51

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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.