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Finding the Fourth Proportional to 21,668.52, 32,519.76 and 11,138.10

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Solution

The fourth proportional to 21,668.52, 32,519.76 and 11,138.10 is: 16,715.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.52 : 32,519.76 = 11,138.10 : x
  2. Step 2: Convert to fraction form
    21,668.52/32,519.76 = 11,138.10/x
  3. Step 3: Cross multiply
    21,668.52x = 32,519.76 × 11,138.10
  4. Step 4: Simplify right side
    21,668.52x = 362,208,338.86
  5. Step 5: Solve for x
    x = 362,208,338.86/21,668.52
  6. Step 6: Final answer
    x = 16,715.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.