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Finding the Fourth Proportional to 20,967.75, 28,935.50 and 11,536.11

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Solution

The fourth proportional to 20,967.75, 28,935.50 and 11,536.11 is: 15,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.75 : 28,935.50 = 11,536.11 : x
  2. Step 2: Convert to fraction form
    20,967.75/28,935.50 = 11,536.11/x
  3. Step 3: Cross multiply
    20,967.75x = 28,935.50 × 11,536.11
  4. Step 4: Simplify right side
    20,967.75x = 333,803,053.22
  5. Step 5: Solve for x
    x = 333,803,053.22/20,967.75
  6. Step 6: Final answer
    x = 15,919.83

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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.