Home / 20,878,966.85-31,321,200.87-7,746,597.81

Finding the Fourth Proportional to 20,878,966.85, 31,321,200.87 and 7,746,597.81

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Solution

The fourth proportional to 20,878,966.85, 31,321,200.87 and 7,746,597.81 is: 11,620,917.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878,966.85 : 31,321,200.87 = 7,746,597.81 : x
  2. Step 2: Convert to fraction form
    20,878,966.85/31,321,200.87 = 7,746,597.81/x
  3. Step 3: Cross multiply
    20,878,966.85x = 31,321,200.87 × 7,746,597.81
  4. Step 4: Simplify right side
    20,878,966.85x = 242,632,746,066,112.09
  5. Step 5: Solve for x
    x = 242,632,746,066,112.09/20,878,966.85
  6. Step 6: Final answer
    x = 11,620,917.25

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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.