Home / 21,940.51-30,281.84-12,383.32

Finding the Fourth Proportional to 21,940.51, 30,281.84 and 12,383.32

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Solution

The fourth proportional to 21,940.51, 30,281.84 and 12,383.32 is: 17,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.51 : 30,281.84 = 12,383.32 : x
  2. Step 2: Convert to fraction form
    21,940.51/30,281.84 = 12,383.32/x
  3. Step 3: Cross multiply
    21,940.51x = 30,281.84 × 12,383.32
  4. Step 4: Simplify right side
    21,940.51x = 374,989,714.91
  5. Step 5: Solve for x
    x = 374,989,714.91/21,940.51
  6. Step 6: Final answer
    x = 17,091.20

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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.