Home / 30,345.05-41,856.62-20,135.86

Finding the Fourth Proportional to 30,345.05, 41,856.62 and 20,135.86

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Solution

The fourth proportional to 30,345.05, 41,856.62 and 20,135.86 is: 27,774.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,345.05 : 41,856.62 = 20,135.86 : x
  2. Step 2: Convert to fraction form
    30,345.05/41,856.62 = 20,135.86/x
  3. Step 3: Cross multiply
    30,345.05x = 41,856.62 × 20,135.86
  4. Step 4: Simplify right side
    30,345.05x = 842,819,040.39
  5. Step 5: Solve for x
    x = 842,819,040.39/30,345.05
  6. Step 6: Final answer
    x = 27,774.51

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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.