Home / 15,795.36-21,797.82-8,721.90

Finding the Fourth Proportional to 15,795.36, 21,797.82 and 8,721.90

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Solution

The fourth proportional to 15,795.36, 21,797.82 and 8,721.90 is: 12,036.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.36 : 21,797.82 = 8,721.90 : x
  2. Step 2: Convert to fraction form
    15,795.36/21,797.82 = 8,721.90/x
  3. Step 3: Cross multiply
    15,795.36x = 21,797.82 × 8,721.90
  4. Step 4: Simplify right side
    15,795.36x = 190,118,406.26
  5. Step 5: Solve for x
    x = 190,118,406.26/15,795.36
  6. Step 6: Final answer
    x = 12,036.35

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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.