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Finding the Fourth Proportional to 14,508.88, 20,021.52 and 8,219.68

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Solution

The fourth proportional to 14,508.88, 20,021.52 and 8,219.68 is: 11,342.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,508.88 : 20,021.52 = 8,219.68 : x
  2. Step 2: Convert to fraction form
    14,508.88/20,021.52 = 8,219.68/x
  3. Step 3: Cross multiply
    14,508.88x = 20,021.52 × 8,219.68
  4. Step 4: Simplify right side
    14,508.88x = 164,570,487.51
  5. Step 5: Solve for x
    x = 164,570,487.51/14,508.88
  6. Step 6: Final answer
    x = 11,342.74

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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.