Home / 15,479.17-21,361.62-8,405.58

Finding the Fourth Proportional to 15,479.17, 21,361.62 and 8,405.58

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Solution

The fourth proportional to 15,479.17, 21,361.62 and 8,405.58 is: 11,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.17 : 21,361.62 = 8,405.58 : x
  2. Step 2: Convert to fraction form
    15,479.17/21,361.62 = 8,405.58/x
  3. Step 3: Cross multiply
    15,479.17x = 21,361.62 × 8,405.58
  4. Step 4: Simplify right side
    15,479.17x = 179,556,805.84
  5. Step 5: Solve for x
    x = 179,556,805.84/15,479.17
  6. Step 6: Final answer
    x = 11,599.90

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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.