Home / 21,009.20-31,542.60-16,631.60

Finding the Fourth Proportional to 21,009.20, 31,542.60 and 16,631.60

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Solution

The fourth proportional to 21,009.20, 31,542.60 and 16,631.60 is: 24,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.20 : 31,542.60 = 16,631.60 : x
  2. Step 2: Convert to fraction form
    21,009.20/31,542.60 = 16,631.60/x
  3. Step 3: Cross multiply
    21,009.20x = 31,542.60 × 16,631.60
  4. Step 4: Simplify right side
    21,009.20x = 524,603,906.16
  5. Step 5: Solve for x
    x = 524,603,906.16/21,009.20
  6. Step 6: Final answer
    x = 24,970.20

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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.