Home / 28,416,420.82-39,211,732.42-20,978,039.01

Finding the Fourth Proportional to 28,416,420.82, 39,211,732.42 and 20,978,039.01

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Solution

The fourth proportional to 28,416,420.82, 39,211,732.42 and 20,978,039.01 is: 28,947,532.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,416,420.82 : 39,211,732.42 = 20,978,039.01 : x
  2. Step 2: Convert to fraction form
    28,416,420.82/39,211,732.42 = 20,978,039.01/x
  3. Step 3: Cross multiply
    28,416,420.82x = 39,211,732.42 × 20,978,039.01
  4. Step 4: Simplify right side
    28,416,420.82x = 822,585,252,356,441.75
  5. Step 5: Solve for x
    x = 822,585,252,356,441.75/28,416,420.82
  6. Step 6: Final answer
    x = 28,947,532.05

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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.