Home / 31,128.06-46,678.80-11,881.20

Finding the Fourth Proportional to 31,128.06, 46,678.80 and 11,881.20

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Solution

The fourth proportional to 31,128.06, 46,678.80 and 11,881.20 is: 17,816.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.06 : 46,678.80 = 11,881.20 : x
  2. Step 2: Convert to fraction form
    31,128.06/46,678.80 = 11,881.20/x
  3. Step 3: Cross multiply
    31,128.06x = 46,678.80 × 11,881.20
  4. Step 4: Simplify right side
    31,128.06x = 554,600,158.56
  5. Step 5: Solve for x
    x = 554,600,158.56/31,128.06
  6. Step 6: Final answer
    x = 17,816.73

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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.