Home / 21,969.72-30,318.24-11,898.18

Finding the Fourth Proportional to 21,969.72, 30,318.24 and 11,898.18

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Solution

The fourth proportional to 21,969.72, 30,318.24 and 11,898.18 is: 16,419.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.72 : 30,318.24 = 11,898.18 : x
  2. Step 2: Convert to fraction form
    21,969.72/30,318.24 = 11,898.18/x
  3. Step 3: Cross multiply
    21,969.72x = 30,318.24 × 11,898.18
  4. Step 4: Simplify right side
    21,969.72x = 360,731,876.80
  5. Step 5: Solve for x
    x = 360,731,876.80/21,969.72
  6. Step 6: Final answer
    x = 16,419.50

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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.