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Finding the Fourth Proportional to 14,919.54, 20,588.53 and 8,205.16

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Solution

The fourth proportional to 14,919.54, 20,588.53 and 8,205.16 is: 11,322.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,919.54 : 20,588.53 = 8,205.16 : x
  2. Step 2: Convert to fraction form
    14,919.54/20,588.53 = 8,205.16/x
  3. Step 3: Cross multiply
    14,919.54x = 20,588.53 × 8,205.16
  4. Step 4: Simplify right side
    14,919.54x = 168,932,182.81
  5. Step 5: Solve for x
    x = 168,932,182.81/14,919.54
  6. Step 6: Final answer
    x = 11,322.88

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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.