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Finding the Fourth Proportional to 30,150.70, 41,608.20 and 16,721.20

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Solution

The fourth proportional to 30,150.70, 41,608.20 and 16,721.20 is: 23,075.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,150.70 : 41,608.20 = 16,721.20 : x
  2. Step 2: Convert to fraction form
    30,150.70/41,608.20 = 16,721.20/x
  3. Step 3: Cross multiply
    30,150.70x = 41,608.20 × 16,721.20
  4. Step 4: Simplify right side
    30,150.70x = 695,739,033.84
  5. Step 5: Solve for x
    x = 695,739,033.84/30,150.70
  6. Step 6: Final answer
    x = 23,075.39

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1.5x scale

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.