Home / 21,930.39-30,262.37-12,370.59

Finding the Fourth Proportional to 21,930.39, 30,262.37 and 12,370.59

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Solution

The fourth proportional to 21,930.39, 30,262.37 and 12,370.59 is: 17,070.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.39 : 30,262.37 = 12,370.59 : x
  2. Step 2: Convert to fraction form
    21,930.39/30,262.37 = 12,370.59/x
  3. Step 3: Cross multiply
    21,930.39x = 30,262.37 × 12,370.59
  4. Step 4: Simplify right side
    21,930.39x = 374,363,309.85
  5. Step 5: Solve for x
    x = 374,363,309.85/21,930.39
  6. Step 6: Final answer
    x = 17,070.53

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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.