Home / 20,723.40-31,137.77-13,230.60

Finding the Fourth Proportional to 20,723.40, 31,137.77 and 13,230.60

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Solution

The fourth proportional to 20,723.40, 31,137.77 and 13,230.60 is: 19,879.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.40 : 31,137.77 = 13,230.60 : x
  2. Step 2: Convert to fraction form
    20,723.40/31,137.77 = 13,230.60/x
  3. Step 3: Cross multiply
    20,723.40x = 31,137.77 × 13,230.60
  4. Step 4: Simplify right side
    20,723.40x = 411,971,313.61
  5. Step 5: Solve for x
    x = 411,971,313.61/20,723.40
  6. Step 6: Final answer
    x = 19,879.52

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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.