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Finding the Fourth Proportional to 14,809.39, 20,431.10 and 8,518.39

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Solution

The fourth proportional to 14,809.39, 20,431.10 and 8,518.39 is: 11,752.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,809.39 : 20,431.10 = 8,518.39 : x
  2. Step 2: Convert to fraction form
    14,809.39/20,431.10 = 8,518.39/x
  3. Step 3: Cross multiply
    14,809.39x = 20,431.10 × 8,518.39
  4. Step 4: Simplify right side
    14,809.39x = 174,039,975.77
  5. Step 5: Solve for x
    x = 174,039,975.77/14,809.39
  6. Step 6: Final answer
    x = 11,752.01

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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.