Home / 21,070.33-31,620.51-9,979.47

Finding the Fourth Proportional to 21,070.33, 31,620.51 and 9,979.47

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Solution

The fourth proportional to 21,070.33, 31,620.51 and 9,979.47 is: 14,976.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.33 : 31,620.51 = 9,979.47 : x
  2. Step 2: Convert to fraction form
    21,070.33/31,620.51 = 9,979.47/x
  3. Step 3: Cross multiply
    21,070.33x = 31,620.51 × 9,979.47
  4. Step 4: Simplify right side
    21,070.33x = 315,555,930.93
  5. Step 5: Solve for x
    x = 315,555,930.93/21,070.33
  6. Step 6: Final answer
    x = 14,976.32

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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.