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Finding the Fourth Proportional to 21,987.60, 32,923.80 and 16,112.40

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Solution

The fourth proportional to 21,987.60, 32,923.80 and 16,112.40 is: 24,126.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.60 : 32,923.80 = 16,112.40 : x
  2. Step 2: Convert to fraction form
    21,987.60/32,923.80 = 16,112.40/x
  3. Step 3: Cross multiply
    21,987.60x = 32,923.80 × 16,112.40
  4. Step 4: Simplify right side
    21,987.60x = 530,481,435.12
  5. Step 5: Solve for x
    x = 530,481,435.12/21,987.60
  6. Step 6: Final answer
    x = 24,126.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.