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Finding the Fourth Proportional to 30,247.80, 45,371.70 and 11,779.80

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Solution

The fourth proportional to 30,247.80, 45,371.70 and 11,779.80 is: 17,669.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,247.80 : 45,371.70 = 11,779.80 : x
  2. Step 2: Convert to fraction form
    30,247.80/45,371.70 = 11,779.80/x
  3. Step 3: Cross multiply
    30,247.80x = 45,371.70 × 11,779.80
  4. Step 4: Simplify right side
    30,247.80x = 534,469,551.66
  5. Step 5: Solve for x
    x = 534,469,551.66/30,247.80
  6. Step 6: Final answer
    x = 17,669.70

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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.