Home / 21,203.40-31,805.10-13,446.60

Finding the Fourth Proportional to 21,203.40, 31,805.10 and 13,446.60

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Solution

The fourth proportional to 21,203.40, 31,805.10 and 13,446.60 is: 20,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.40 : 31,805.10 = 13,446.60 : x
  2. Step 2: Convert to fraction form
    21,203.40/31,805.10 = 13,446.60/x
  3. Step 3: Cross multiply
    21,203.40x = 31,805.10 × 13,446.60
  4. Step 4: Simplify right side
    21,203.40x = 427,670,457.66
  5. Step 5: Solve for x
    x = 427,670,457.66/21,203.40
  6. Step 6: Final answer
    x = 20,169.90

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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.