Home / 15,621.37-21,557.58-8,451.29

Finding the Fourth Proportional to 15,621.37, 21,557.58 and 8,451.29

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Solution

The fourth proportional to 15,621.37, 21,557.58 and 8,451.29 is: 11,662.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.37 : 21,557.58 = 8,451.29 : x
  2. Step 2: Convert to fraction form
    15,621.37/21,557.58 = 8,451.29/x
  3. Step 3: Cross multiply
    15,621.37x = 21,557.58 × 8,451.29
  4. Step 4: Simplify right side
    15,621.37x = 182,189,360.28
  5. Step 5: Solve for x
    x = 182,189,360.28/15,621.37
  6. Step 6: Final answer
    x = 11,662.83

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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.