Home / 21,172.78-29,212.56-16,682.62

Finding the Fourth Proportional to 21,172.78, 29,212.56 and 16,682.62

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Solution

The fourth proportional to 21,172.78, 29,212.56 and 16,682.62 is: 23,017.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.78 : 29,212.56 = 16,682.62 : x
  2. Step 2: Convert to fraction form
    21,172.78/29,212.56 = 16,682.62/x
  3. Step 3: Cross multiply
    21,172.78x = 29,212.56 × 16,682.62
  4. Step 4: Simplify right side
    21,172.78x = 487,342,037.71
  5. Step 5: Solve for x
    x = 487,342,037.71/21,172.78
  6. Step 6: Final answer
    x = 23,017.39

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1.5x scale

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.