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Finding the Fourth Proportional to 14,628.69, 20,187.90 and 8,658.18

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Solution

The fourth proportional to 14,628.69, 20,187.90 and 8,658.18 is: 11,948.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,628.69 : 20,187.90 = 8,658.18 : x
  2. Step 2: Convert to fraction form
    14,628.69/20,187.90 = 8,658.18/x
  3. Step 3: Cross multiply
    14,628.69x = 20,187.90 × 8,658.18
  4. Step 4: Simplify right side
    14,628.69x = 174,790,428.73
  5. Step 5: Solve for x
    x = 174,790,428.73/14,628.69
  6. Step 6: Final answer
    x = 11,948.47

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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.