Home / 20,687,875.69-28,548,213.32-11,395,245.72

Finding the Fourth Proportional to 20,687,875.69, 28,548,213.32 and 11,395,245.72

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Solution

The fourth proportional to 20,687,875.69, 28,548,213.32 and 11,395,245.72 is: 15,724,857.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687,875.69 : 28,548,213.32 = 11,395,245.72 : x
  2. Step 2: Convert to fraction form
    20,687,875.69/28,548,213.32 = 11,395,245.72/x
  3. Step 3: Cross multiply
    20,687,875.69x = 28,548,213.32 × 11,395,245.72
  4. Step 4: Simplify right side
    20,687,875.69x = 325,313,905,648,377
  5. Step 5: Solve for x
    x = 325,313,905,648,377/20,687,875.69
  6. Step 6: Final answer
    x = 15,724,857.91

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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.