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Finding the Fourth Proportional to 14,703.12, 20,288.88 and 8,414.28

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Solution

The fourth proportional to 14,703.12, 20,288.88 and 8,414.28 is: 11,610.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,703.12 : 20,288.88 = 8,414.28 : x
  2. Step 2: Convert to fraction form
    14,703.12/20,288.88 = 8,414.28/x
  3. Step 3: Cross multiply
    14,703.12x = 20,288.88 × 8,414.28
  4. Step 4: Simplify right side
    14,703.12x = 170,716,317.21
  5. Step 5: Solve for x
    x = 170,716,317.21/14,703.12
  6. Step 6: Final answer
    x = 11,610.89

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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.