Home / 20,513.34-28,309.55-11,561.22

Finding the Fourth Proportional to 20,513.34, 28,309.55 and 11,561.22

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Solution

The fourth proportional to 20,513.34, 28,309.55 and 11,561.22 is: 15,955.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.34 : 28,309.55 = 11,561.22 : x
  2. Step 2: Convert to fraction form
    20,513.34/28,309.55 = 11,561.22/x
  3. Step 3: Cross multiply
    20,513.34x = 28,309.55 × 11,561.22
  4. Step 4: Simplify right side
    20,513.34x = 327,292,877.84
  5. Step 5: Solve for x
    x = 327,292,877.84/20,513.34
  6. Step 6: Final answer
    x = 15,955.12

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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.