Home / 28,416,421.82-39,211,733.80-20,978,040.02

Finding the Fourth Proportional to 28,416,421.82, 39,211,733.80 and 20,978,040.02

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Solution

The fourth proportional to 28,416,421.82, 39,211,733.80 and 20,978,040.02 is: 28,947,533.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,416,421.82 : 39,211,733.80 = 20,978,040.02 : x
  2. Step 2: Convert to fraction form
    28,416,421.82/39,211,733.80 = 20,978,040.02/x
  3. Step 3: Cross multiply
    28,416,421.82x = 39,211,733.80 × 20,978,040.02
  4. Step 4: Simplify right side
    28,416,421.82x = 822,585,320,909,986.62
  5. Step 5: Solve for x
    x = 822,585,320,909,986.62/28,416,421.82
  6. Step 6: Final answer
    x = 28,947,533.44

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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.