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Finding the Fourth Proportional to 21,927.60, 30,259.80 and 11,991.60

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Solution

The fourth proportional to 21,927.60, 30,259.80 and 11,991.60 is: 16,548.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,927.60 : 30,259.80 = 11,991.60 : x
  2. Step 2: Convert to fraction form
    21,927.60/30,259.80 = 11,991.60/x
  3. Step 3: Cross multiply
    21,927.60x = 30,259.80 × 11,991.60
  4. Step 4: Simplify right side
    21,927.60x = 362,863,417.68
  5. Step 5: Solve for x
    x = 362,863,417.68/21,927.60
  6. Step 6: Final answer
    x = 16,548.25

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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.