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Finding the Fourth Proportional to 14,425.81, 19,910.94 and 8,459.40

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Solution

The fourth proportional to 14,425.81, 19,910.94 and 8,459.40 is: 11,675.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,425.81 : 19,910.94 = 8,459.40 : x
  2. Step 2: Convert to fraction form
    14,425.81/19,910.94 = 8,459.40/x
  3. Step 3: Cross multiply
    14,425.81x = 19,910.94 × 8,459.40
  4. Step 4: Simplify right side
    14,425.81x = 168,434,540.81
  5. Step 5: Solve for x
    x = 168,434,540.81/14,425.81
  6. Step 6: Final answer
    x = 11,675.92

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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.