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Finding the Fourth Proportional to 14,940.89, 20,613.77 and 8,479.45

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Solution

The fourth proportional to 14,940.89, 20,613.77 and 8,479.45 is: 11,699.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,940.89 : 20,613.77 = 8,479.45 : x
  2. Step 2: Convert to fraction form
    14,940.89/20,613.77 = 8,479.45/x
  3. Step 3: Cross multiply
    14,940.89x = 20,613.77 × 8,479.45
  4. Step 4: Simplify right side
    14,940.89x = 174,793,432.03
  5. Step 5: Solve for x
    x = 174,793,432.03/14,940.89
  6. Step 6: Final answer
    x = 11,699.00

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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.