Home / 21,231.54-31,856.05-9,379.07

Finding the Fourth Proportional to 21,231.54, 31,856.05 and 9,379.07

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Solution

The fourth proportional to 21,231.54, 31,856.05 and 9,379.07 is: 14,072.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.54 : 31,856.05 = 9,379.07 : x
  2. Step 2: Convert to fraction form
    21,231.54/31,856.05 = 9,379.07/x
  3. Step 3: Cross multiply
    21,231.54x = 31,856.05 × 9,379.07
  4. Step 4: Simplify right side
    21,231.54x = 298,779,940.15
  5. Step 5: Solve for x
    x = 298,779,940.15/21,231.54
  6. Step 6: Final answer
    x = 14,072.46

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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.