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Finding the Fourth Proportional to 14,899.55, 20,561.90 and 8,185.40

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Solution

The fourth proportional to 14,899.55, 20,561.90 and 8,185.40 is: 11,296.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,899.55 : 20,561.90 = 8,185.40 : x
  2. Step 2: Convert to fraction form
    14,899.55/20,561.90 = 8,185.40/x
  3. Step 3: Cross multiply
    14,899.55x = 20,561.90 × 8,185.40
  4. Step 4: Simplify right side
    14,899.55x = 168,307,471.33
  5. Step 5: Solve for x
    x = 168,307,471.33/14,899.55
  6. Step 6: Final answer
    x = 11,296.15

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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.