Home / 30,009.48-41,396.76-20,920.50

Finding the Fourth Proportional to 30,009.48, 41,396.76 and 20,920.50

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Solution

The fourth proportional to 30,009.48, 41,396.76 and 20,920.50 is: 28,858.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,009.48 : 41,396.76 = 20,920.50 : x
  2. Step 2: Convert to fraction form
    30,009.48/41,396.76 = 20,920.50/x
  3. Step 3: Cross multiply
    30,009.48x = 41,396.76 × 20,920.50
  4. Step 4: Simplify right side
    30,009.48x = 866,040,917.58
  5. Step 5: Solve for x
    x = 866,040,917.58/30,009.48
  6. Step 6: Final answer
    x = 28,858.91

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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.