Home / 15,391,479.36-21,239,913.48-8,422,128.24

Finding the Fourth Proportional to 15,391,479.36, 21,239,913.48 and 8,422,128.24

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Solution

The fourth proportional to 15,391,479.36, 21,239,913.48 and 8,422,128.24 is: 11,622,357.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391,479.36 : 21,239,913.48 = 8,422,128.24 : x
  2. Step 2: Convert to fraction form
    15,391,479.36/21,239,913.48 = 8,422,128.24/x
  3. Step 3: Cross multiply
    15,391,479.36x = 21,239,913.48 × 8,422,128.24
  4. Step 4: Simplify right side
    15,391,479.36x = 178,885,275,135,064.69
  5. Step 5: Solve for x
    x = 178,885,275,135,064.69/15,391,479.36
  6. Step 6: Final answer
    x = 11,622,357.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.