Home / 21,922.85-30,255.32-12,968.91

Finding the Fourth Proportional to 21,922.85, 30,255.32 and 12,968.91

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Solution

The fourth proportional to 21,922.85, 30,255.32 and 12,968.91 is: 17,898.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,922.85 : 30,255.32 = 12,968.91 : x
  2. Step 2: Convert to fraction form
    21,922.85/30,255.32 = 12,968.91/x
  3. Step 3: Cross multiply
    21,922.85x = 30,255.32 × 12,968.91
  4. Step 4: Simplify right side
    21,922.85x = 392,378,554.52
  5. Step 5: Solve for x
    x = 392,378,554.52/21,922.85
  6. Step 6: Final answer
    x = 17,898.15

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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.