Home / 21,881.28-30,194.37-12,318.11

Finding the Fourth Proportional to 21,881.28, 30,194.37 and 12,318.11

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Solution

The fourth proportional to 21,881.28, 30,194.37 and 12,318.11 is: 16,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.28 : 30,194.37 = 12,318.11 : x
  2. Step 2: Convert to fraction form
    21,881.28/30,194.37 = 12,318.11/x
  3. Step 3: Cross multiply
    21,881.28x = 30,194.37 × 12,318.11
  4. Step 4: Simplify right side
    21,881.28x = 371,937,420.07
  5. Step 5: Solve for x
    x = 371,937,420.07/21,881.28
  6. Step 6: Final answer
    x = 16,997.97

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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.