Home / 20,918.56-28,866.48-11,485.60

Finding the Fourth Proportional to 20,918.56, 28,866.48 and 11,485.60

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Solution

The fourth proportional to 20,918.56, 28,866.48 and 11,485.60 is: 15,849.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.56 : 28,866.48 = 11,485.60 : x
  2. Step 2: Convert to fraction form
    20,918.56/28,866.48 = 11,485.60/x
  3. Step 3: Cross multiply
    20,918.56x = 28,866.48 × 11,485.60
  4. Step 4: Simplify right side
    20,918.56x = 331,548,842.69
  5. Step 5: Solve for x
    x = 331,548,842.69/20,918.56
  6. Step 6: Final answer
    x = 15,849.51

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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.