Home / 20,347.36-28,078.96-11,272.48

Finding the Fourth Proportional to 20,347.36, 28,078.96 and 11,272.48

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Solution

The fourth proportional to 20,347.36, 28,078.96 and 11,272.48 is: 15,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.36 : 28,078.96 = 11,272.48 : x
  2. Step 2: Convert to fraction form
    20,347.36/28,078.96 = 11,272.48/x
  3. Step 3: Cross multiply
    20,347.36x = 28,078.96 × 11,272.48
  4. Step 4: Simplify right side
    20,347.36x = 316,519,515.02
  5. Step 5: Solve for x
    x = 316,519,515.02/20,347.36
  6. Step 6: Final answer
    x = 15,555.80

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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.