Home / 21,319.72-31,979.64-7,465.48

Finding the Fourth Proportional to 21,319.72, 31,979.64 and 7,465.48

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Solution

The fourth proportional to 21,319.72, 31,979.64 and 7,465.48 is: 11,198.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.72 : 31,979.64 = 7,465.48 : x
  2. Step 2: Convert to fraction form
    21,319.72/31,979.64 = 7,465.48/x
  3. Step 3: Cross multiply
    21,319.72x = 31,979.64 × 7,465.48
  4. Step 4: Simplify right side
    21,319.72x = 238,743,362.83
  5. Step 5: Solve for x
    x = 238,743,362.83/21,319.72
  6. Step 6: Final answer
    x = 11,198.24

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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.