Home / 21,969.80-30,318.34-11,898.32

Finding the Fourth Proportional to 21,969.80, 30,318.34 and 11,898.32

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Solution

The fourth proportional to 21,969.80, 30,318.34 and 11,898.32 is: 16,419.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.80 : 30,318.34 = 11,898.32 : x
  2. Step 2: Convert to fraction form
    21,969.80/30,318.34 = 11,898.32/x
  3. Step 3: Cross multiply
    21,969.80x = 30,318.34 × 11,898.32
  4. Step 4: Simplify right side
    21,969.80x = 360,737,311.19
  5. Step 5: Solve for x
    x = 360,737,311.19/21,969.80
  6. Step 6: Final answer
    x = 16,419.69

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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.