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Finding the Fourth Proportional to 21,782.58, 30,059.91 and 12,351.12

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Solution

The fourth proportional to 21,782.58, 30,059.91 and 12,351.12 is: 17,044.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,782.58 : 30,059.91 = 12,351.12 : x
  2. Step 2: Convert to fraction form
    21,782.58/30,059.91 = 12,351.12/x
  3. Step 3: Cross multiply
    21,782.58x = 30,059.91 × 12,351.12
  4. Step 4: Simplify right side
    21,782.58x = 371,273,555.60
  5. Step 5: Solve for x
    x = 371,273,555.60/21,782.58
  6. Step 6: Final answer
    x = 17,044.52

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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.