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Finding the Fourth Proportional to 30,159.54, 41,621.40 and 18,220.50

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Solution

The fourth proportional to 30,159.54, 41,621.40 and 18,220.50 is: 25,145.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,159.54 : 41,621.40 = 18,220.50 : x
  2. Step 2: Convert to fraction form
    30,159.54/41,621.40 = 18,220.50/x
  3. Step 3: Cross multiply
    30,159.54x = 41,621.40 × 18,220.50
  4. Step 4: Simplify right side
    30,159.54x = 758,362,718.70
  5. Step 5: Solve for x
    x = 758,362,718.70/30,159.54
  6. Step 6: Final answer
    x = 25,145.04

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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.