Home / 21,270.20-31,905.30-9,606.20

Finding the Fourth Proportional to 21,270.20, 31,905.30 and 9,606.20

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Solution

The fourth proportional to 21,270.20, 31,905.30 and 9,606.20 is: 14,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.20 : 31,905.30 = 9,606.20 : x
  2. Step 2: Convert to fraction form
    21,270.20/31,905.30 = 9,606.20/x
  3. Step 3: Cross multiply
    21,270.20x = 31,905.30 × 9,606.20
  4. Step 4: Simplify right side
    21,270.20x = 306,488,692.86
  5. Step 5: Solve for x
    x = 306,488,692.86/21,270.20
  6. Step 6: Final answer
    x = 14,409.30

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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.