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Finding the Fourth Proportional to 13,376, 18,458.88 and 7,790.72

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Solution

The fourth proportional to 13,376, 18,458.88 and 7,790.72 is: 10,751.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,376 : 18,458.88 = 7,790.72 : x
  2. Step 2: Convert to fraction form
    13,376/18,458.88 = 7,790.72/x
  3. Step 3: Cross multiply
    13,376x = 18,458.88 × 7,790.72
  4. Step 4: Simplify right side
    13,376x = 143,807,965.59
  5. Step 5: Solve for x
    x = 143,807,965.59/13,376
  6. Step 6: Final answer
    x = 10,751.19

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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.