Home / 30,155.76-41,608.60-18,216.76

Finding the Fourth Proportional to 30,155.76, 41,608.60 and 18,216.76

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Solution

The fourth proportional to 30,155.76, 41,608.60 and 18,216.76 is: 25,135.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,155.76 : 41,608.60 = 18,216.76 : x
  2. Step 2: Convert to fraction form
    30,155.76/41,608.60 = 18,216.76/x
  3. Step 3: Cross multiply
    30,155.76x = 41,608.60 × 18,216.76
  4. Step 4: Simplify right side
    30,155.76x = 757,973,880.14
  5. Step 5: Solve for x
    x = 757,973,880.14/30,155.76
  6. Step 6: Final answer
    x = 25,135.29

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Half scale
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Double scale
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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.