Home / 15,621.39-21,543.48-10,321.56

Finding the Fourth Proportional to 15,621.39, 21,543.48 and 10,321.56

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Solution

The fourth proportional to 15,621.39, 21,543.48 and 10,321.56 is: 14,234.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.39 : 21,543.48 = 10,321.56 : x
  2. Step 2: Convert to fraction form
    15,621.39/21,543.48 = 10,321.56/x
  3. Step 3: Cross multiply
    15,621.39x = 21,543.48 × 10,321.56
  4. Step 4: Simplify right side
    15,621.39x = 222,362,321.43
  5. Step 5: Solve for x
    x = 222,362,321.43/15,621.39
  6. Step 6: Final answer
    x = 14,234.48

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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.