Home / 20,687,318.64-28,548,499.44-11,990,535.72

Finding the Fourth Proportional to 20,687,318.64, 28,548,499.44 and 11,990,535.72

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Solution

The fourth proportional to 20,687,318.64, 28,548,499.44 and 11,990,535.72 is: 16,546,939.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687,318.64 : 28,548,499.44 = 11,990,535.72 : x
  2. Step 2: Convert to fraction form
    20,687,318.64/28,548,499.44 = 11,990,535.72/x
  3. Step 3: Cross multiply
    20,687,318.64x = 28,548,499.44 × 11,990,535.72
  4. Step 4: Simplify right side
    20,687,318.64x = 342,311,802,287,720.06
  5. Step 5: Solve for x
    x = 342,311,802,287,720.06/20,687,318.64
  6. Step 6: Final answer
    x = 16,546,939.13

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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.