Home / 31,172.40-46,749.96-8,979.78

Finding the Fourth Proportional to 31,172.40, 46,749.96 and 8,979.78

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Solution

The fourth proportional to 31,172.40, 46,749.96 and 8,979.78 is: 13,467.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,172.40 : 46,749.96 = 8,979.78 : x
  2. Step 2: Convert to fraction form
    31,172.40/46,749.96 = 8,979.78/x
  3. Step 3: Cross multiply
    31,172.40x = 46,749.96 × 8,979.78
  4. Step 4: Simplify right side
    31,172.40x = 419,804,355.81
  5. Step 5: Solve for x
    x = 419,804,355.81/31,172.40
  6. Step 6: Final answer
    x = 13,467.18

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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.