Home / 21,943.21-30,281.57-12,383.06

Finding the Fourth Proportional to 21,943.21, 30,281.57 and 12,383.06

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Solution

The fourth proportional to 21,943.21, 30,281.57 and 12,383.06 is: 17,088.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,943.21 : 30,281.57 = 12,383.06 : x
  2. Step 2: Convert to fraction form
    21,943.21/30,281.57 = 12,383.06/x
  3. Step 3: Cross multiply
    21,943.21x = 30,281.57 × 12,383.06
  4. Step 4: Simplify right side
    21,943.21x = 374,978,574.55
  5. Step 5: Solve for x
    x = 374,978,574.55/21,943.21
  6. Step 6: Final answer
    x = 17,088.60

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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.