Home / 13,615.73-18,782.93-11,820.77

Finding the Fourth Proportional to 13,615.73, 18,782.93 and 11,820.77

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Solution

The fourth proportional to 13,615.73, 18,782.93 and 11,820.77 is: 16,306.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.73 : 18,782.93 = 11,820.77 : x
  2. Step 2: Convert to fraction form
    13,615.73/18,782.93 = 11,820.77/x
  3. Step 3: Cross multiply
    13,615.73x = 18,782.93 × 11,820.77
  4. Step 4: Simplify right side
    13,615.73x = 222,028,631.09
  5. Step 5: Solve for x
    x = 222,028,631.09/13,615.73
  6. Step 6: Final answer
    x = 16,306.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.