Home / 21,840.44-30,138.84-12,409.52

Finding the Fourth Proportional to 21,840.44, 30,138.84 and 12,409.52

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Solution

The fourth proportional to 21,840.44, 30,138.84 and 12,409.52 is: 17,124.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,840.44 : 30,138.84 = 12,409.52 : x
  2. Step 2: Convert to fraction form
    21,840.44/30,138.84 = 12,409.52/x
  3. Step 3: Cross multiply
    21,840.44x = 30,138.84 × 12,409.52
  4. Step 4: Simplify right side
    21,840.44x = 374,008,537.76
  5. Step 5: Solve for x
    x = 374,008,537.76/21,840.44
  6. Step 6: Final answer
    x = 17,124.59

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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.