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Finding the Fourth Proportional to 19,597.40, 27,028.30 and 13,221.80

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Solution

The fourth proportional to 19,597.40, 27,028.30 and 13,221.80 is: 18,235.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,597.40 : 27,028.30 = 13,221.80 : x
  2. Step 2: Convert to fraction form
    19,597.40/27,028.30 = 13,221.80/x
  3. Step 3: Cross multiply
    19,597.40x = 27,028.30 × 13,221.80
  4. Step 4: Simplify right side
    19,597.40x = 357,362,776.94
  5. Step 5: Solve for x
    x = 357,362,776.94/19,597.40
  6. Step 6: Final answer
    x = 18,235.21

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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.