Home / 21,227.20-31,840.80-16,321.60

Finding the Fourth Proportional to 21,227.20, 31,840.80 and 16,321.60

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Solution

The fourth proportional to 21,227.20, 31,840.80 and 16,321.60 is: 24,482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227.20 : 31,840.80 = 16,321.60 : x
  2. Step 2: Convert to fraction form
    21,227.20/31,840.80 = 16,321.60/x
  3. Step 3: Cross multiply
    21,227.20x = 31,840.80 × 16,321.60
  4. Step 4: Simplify right side
    21,227.20x = 519,692,801.28
  5. Step 5: Solve for x
    x = 519,692,801.28/21,227.20
  6. Step 6: Final answer
    x = 24,482.40

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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.