Home / 15,851.78-21,875.41-9,137.37

Finding the Fourth Proportional to 15,851.78, 21,875.41 and 9,137.37

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Solution

The fourth proportional to 15,851.78, 21,875.41 and 9,137.37 is: 12,609.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.78 : 21,875.41 = 9,137.37 : x
  2. Step 2: Convert to fraction form
    15,851.78/21,875.41 = 9,137.37/x
  3. Step 3: Cross multiply
    15,851.78x = 21,875.41 × 9,137.37
  4. Step 4: Simplify right side
    15,851.78x = 199,883,582.85
  5. Step 5: Solve for x
    x = 199,883,582.85/15,851.78
  6. Step 6: Final answer
    x = 12,609.53

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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.