Home / 28,416,421.32-39,211,733.11-20,978,039.51

Finding the Fourth Proportional to 28,416,421.32, 39,211,733.11 and 20,978,039.51

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Solution

The fourth proportional to 28,416,421.32, 39,211,733.11 and 20,978,039.51 is: 28,947,532.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,416,421.32 : 39,211,733.11 = 20,978,039.51 : x
  2. Step 2: Convert to fraction form
    28,416,421.32/39,211,733.11 = 20,978,039.51/x
  3. Step 3: Cross multiply
    28,416,421.32x = 39,211,733.11 × 20,978,039.51
  4. Step 4: Simplify right side
    28,416,421.32x = 822,585,286,437,155.25
  5. Step 5: Solve for x
    x = 822,585,286,437,155.25/28,416,421.32
  6. Step 6: Final answer
    x = 28,947,532.74

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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.