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Finding the Fourth Proportional to 46,400.80, 69,601.60 and 13,121.60

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Solution

The fourth proportional to 46,400.80, 69,601.60 and 13,121.60 is: 19,682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,400.80 : 69,601.60 = 13,121.60 : x
  2. Step 2: Convert to fraction form
    46,400.80/69,601.60 = 13,121.60/x
  3. Step 3: Cross multiply
    46,400.80x = 69,601.60 × 13,121.60
  4. Step 4: Simplify right side
    46,400.80x = 913,284,354.56
  5. Step 5: Solve for x
    x = 913,284,354.56/46,400.80
  6. Step 6: Final answer
    x = 19,682.51

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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.