Home / 8,720,811.20-13,088,992.80-5,122,078.40

Finding the Fourth Proportional to 8,720,811.20, 13,088,992.80 and 5,122,078.40

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Solution

The fourth proportional to 8,720,811.20, 13,088,992.80 and 5,122,078.40 is: 7,687,684.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720,811.20 : 13,088,992.80 = 5,122,078.40 : x
  2. Step 2: Convert to fraction form
    8,720,811.20/13,088,992.80 = 5,122,078.40/x
  3. Step 3: Cross multiply
    8,720,811.20x = 13,088,992.80 × 5,122,078.40
  4. Step 4: Simplify right side
    8,720,811.20x = 67,042,847,298,635.53
  5. Step 5: Solve for x
    x = 67,042,847,298,635.53/8,720,811.20
  6. Step 6: Final answer
    x = 7,687,684.75

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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.