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Finding the Fourth Proportional to 20,508.01, 28,301.13 and 11,895.88

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Solution

The fourth proportional to 20,508.01, 28,301.13 and 11,895.88 is: 16,416.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.01 : 28,301.13 = 11,895.88 : x
  2. Step 2: Convert to fraction form
    20,508.01/28,301.13 = 11,895.88/x
  3. Step 3: Cross multiply
    20,508.01x = 28,301.13 × 11,895.88
  4. Step 4: Simplify right side
    20,508.01x = 336,666,846.34
  5. Step 5: Solve for x
    x = 336,666,846.34/20,508.01
  6. Step 6: Final answer
    x = 16,416.36

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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.