Home / 21,081.24-31,621.86-7,230.36

Finding the Fourth Proportional to 21,081.24, 31,621.86 and 7,230.36

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Solution

The fourth proportional to 21,081.24, 31,621.86 and 7,230.36 is: 10,845.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.24 : 31,621.86 = 7,230.36 : x
  2. Step 2: Convert to fraction form
    21,081.24/31,621.86 = 7,230.36/x
  3. Step 3: Cross multiply
    21,081.24x = 31,621.86 × 7,230.36
  4. Step 4: Simplify right side
    21,081.24x = 228,637,431.67
  5. Step 5: Solve for x
    x = 228,637,431.67/21,081.24
  6. Step 6: Final answer
    x = 10,845.54

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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.