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Finding the Fourth Proportional to 21,771.94, 30,059.67 and 19,409.98

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Solution

The fourth proportional to 21,771.94, 30,059.67 and 19,409.98 is: 26,798.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.94 : 30,059.67 = 19,409.98 : x
  2. Step 2: Convert to fraction form
    21,771.94/30,059.67 = 19,409.98/x
  3. Step 3: Cross multiply
    21,771.94x = 30,059.67 × 19,409.98
  4. Step 4: Simplify right side
    21,771.94x = 583,457,593.51
  5. Step 5: Solve for x
    x = 583,457,593.51/21,771.94
  6. Step 6: Final answer
    x = 26,798.60

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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.