Home / 20,513.63-28,308.57-11,561.12

Finding the Fourth Proportional to 20,513.63, 28,308.57 and 11,561.12

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Solution

The fourth proportional to 20,513.63, 28,308.57 and 11,561.12 is: 15,954.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.63 : 28,308.57 = 11,561.12 : x
  2. Step 2: Convert to fraction form
    20,513.63/28,308.57 = 11,561.12/x
  3. Step 3: Cross multiply
    20,513.63x = 28,308.57 × 11,561.12
  4. Step 4: Simplify right side
    20,513.63x = 327,278,633.26
  5. Step 5: Solve for x
    x = 327,278,633.26/20,513.63
  6. Step 6: Final answer
    x = 15,954.21

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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.