Home / 28,721.52-43,083-7,945.20

Finding the Fourth Proportional to 28,721.52, 43,083 and 7,945.20

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Solution

The fourth proportional to 28,721.52, 43,083 and 7,945.20 is: 11,918.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.52 : 43,083 = 7,945.20 : x
  2. Step 2: Convert to fraction form
    28,721.52/43,083 = 7,945.20/x
  3. Step 3: Cross multiply
    28,721.52x = 43,083 × 7,945.20
  4. Step 4: Simplify right side
    28,721.52x = 342,303,051.60
  5. Step 5: Solve for x
    x = 342,303,051.60/28,721.52
  6. Step 6: Final answer
    x = 11,918.00

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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.