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Finding the Fourth Proportional to 14,987.91, 20,682.25 and 8,272.10

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Solution

The fourth proportional to 14,987.91, 20,682.25 and 8,272.10 is: 11,414.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.91 : 20,682.25 = 8,272.10 : x
  2. Step 2: Convert to fraction form
    14,987.91/20,682.25 = 8,272.10/x
  3. Step 3: Cross multiply
    14,987.91x = 20,682.25 × 8,272.10
  4. Step 4: Simplify right side
    14,987.91x = 171,085,536.81
  5. Step 5: Solve for x
    x = 171,085,536.81/14,987.91
  6. Step 6: Final answer
    x = 11,414.90

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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.