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Finding the Fourth Proportional to 18,895.67, 28,281.72 and 13,896.69

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Solution

The fourth proportional to 18,895.67, 28,281.72 and 13,896.69 is: 20,799.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,895.67 : 28,281.72 = 13,896.69 : x
  2. Step 2: Convert to fraction form
    18,895.67/28,281.72 = 13,896.69/x
  3. Step 3: Cross multiply
    18,895.67x = 28,281.72 × 13,896.69
  4. Step 4: Simplify right side
    18,895.67x = 393,022,295.51
  5. Step 5: Solve for x
    x = 393,022,295.51/18,895.67
  6. Step 6: Final answer
    x = 20,799.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.