Home / 20,513.76-28,309.49-11,439.03

Finding the Fourth Proportional to 20,513.76, 28,309.49 and 11,439.03

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Solution

The fourth proportional to 20,513.76, 28,309.49 and 11,439.03 is: 15,786.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.76 : 28,309.49 = 11,439.03 : x
  2. Step 2: Convert to fraction form
    20,513.76/28,309.49 = 11,439.03/x
  3. Step 3: Cross multiply
    20,513.76x = 28,309.49 × 11,439.03
  4. Step 4: Simplify right side
    20,513.76x = 323,833,268.32
  5. Step 5: Solve for x
    x = 323,833,268.32/20,513.76
  6. Step 6: Final answer
    x = 15,786.15

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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.