Home / 28,416,420.46-39,211,731.89-20,978,038.65

Finding the Fourth Proportional to 28,416,420.46, 39,211,731.89 and 20,978,038.65

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Solution

The fourth proportional to 28,416,420.46, 39,211,731.89 and 20,978,038.65 is: 28,947,531.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,416,420.46 : 39,211,731.89 = 20,978,038.65 : x
  2. Step 2: Convert to fraction form
    28,416,420.46/39,211,731.89 = 20,978,038.65/x
  3. Step 3: Cross multiply
    28,416,420.46x = 39,211,731.89 × 20,978,038.65
  4. Step 4: Simplify right side
    28,416,420.46x = 822,585,227,121,857.50
  5. Step 5: Solve for x
    x = 822,585,227,121,857.50/28,416,420.46
  6. Step 6: Final answer
    x = 28,947,531.53

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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.