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Finding the Fourth Proportional to 46,658.85, 69,991.70 and 19,978.82

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Solution

The fourth proportional to 46,658.85, 69,991.70 and 19,978.82 is: 29,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,658.85 : 69,991.70 = 19,978.82 : x
  2. Step 2: Convert to fraction form
    46,658.85/69,991.70 = 19,978.82/x
  3. Step 3: Cross multiply
    46,658.85x = 69,991.70 × 19,978.82
  4. Step 4: Simplify right side
    46,658.85x = 1,398,351,388.41
  5. Step 5: Solve for x
    x = 1,398,351,388.41/46,658.85
  6. Step 6: Final answer
    x = 29,969.69

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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.