Home / 20,513.66-28,309.50-11,561.94

Finding the Fourth Proportional to 20,513.66, 28,309.50 and 11,561.94

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Solution

The fourth proportional to 20,513.66, 28,309.50 and 11,561.94 is: 15,955.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.66 : 28,309.50 = 11,561.94 : x
  2. Step 2: Convert to fraction form
    20,513.66/28,309.50 = 11,561.94/x
  3. Step 3: Cross multiply
    20,513.66x = 28,309.50 × 11,561.94
  4. Step 4: Simplify right side
    20,513.66x = 327,312,740.43
  5. Step 5: Solve for x
    x = 327,312,740.43/20,513.66
  6. Step 6: Final answer
    x = 15,955.85

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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.