Home / 28,416,422.32-39,211,734.49-20,978,040.52

Finding the Fourth Proportional to 28,416,422.32, 39,211,734.49 and 20,978,040.52

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Solution

The fourth proportional to 28,416,422.32, 39,211,734.49 and 20,978,040.52 is: 28,947,534.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,416,422.32 : 39,211,734.49 = 20,978,040.52 : x
  2. Step 2: Convert to fraction form
    28,416,422.32/39,211,734.49 = 20,978,040.52/x
  3. Step 3: Cross multiply
    28,416,422.32x = 39,211,734.49 × 20,978,040.52
  4. Step 4: Simplify right side
    28,416,422.32x = 822,585,354,990,701.50
  5. Step 5: Solve for x
    x = 822,585,354,990,701.50/28,416,422.32
  6. Step 6: Final answer
    x = 28,947,534.13

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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.