Home / 20,775,025.89-31,162,981.70-7,128,113.07

Finding the Fourth Proportional to 20,775,025.89, 31,162,981.70 and 7,128,113.07

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Solution

The fourth proportional to 20,775,025.89, 31,162,981.70 and 7,128,113.07 is: 10,692,321.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775,025.89 : 31,162,981.70 = 7,128,113.07 : x
  2. Step 2: Convert to fraction form
    20,775,025.89/31,162,981.70 = 7,128,113.07/x
  3. Step 3: Cross multiply
    20,775,025.89x = 31,162,981.70 × 7,128,113.07
  4. Step 4: Simplify right side
    20,775,025.89x = 222,133,257,120,300.25
  5. Step 5: Solve for x
    x = 222,133,257,120,300.25/20,775,025.89
  6. Step 6: Final answer
    x = 10,692,321.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.