Home / 21,231.96-31,851.32-6,437.40

Finding the Fourth Proportional to 21,231.96, 31,851.32 and 6,437.40

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Solution

The fourth proportional to 21,231.96, 31,851.32 and 6,437.40 is: 9,657.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.96 : 31,851.32 = 6,437.40 : x
  2. Step 2: Convert to fraction form
    21,231.96/31,851.32 = 6,437.40/x
  3. Step 3: Cross multiply
    21,231.96x = 31,851.32 × 6,437.40
  4. Step 4: Simplify right side
    21,231.96x = 205,039,687.37
  5. Step 5: Solve for x
    x = 205,039,687.37/21,231.96
  6. Step 6: Final answer
    x = 9,657.12

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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.