Home / 20,453,820.89-28,226,871.77-11,161,989.70

Finding the Fourth Proportional to 20,453,820.89, 28,226,871.77 and 11,161,989.70

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Solution

The fourth proportional to 20,453,820.89, 28,226,871.77 and 11,161,989.70 is: 15,403,872.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453,820.89 : 28,226,871.77 = 11,161,989.70 : x
  2. Step 2: Convert to fraction form
    20,453,820.89/28,226,871.77 = 11,161,989.70/x
  3. Step 3: Cross multiply
    20,453,820.89x = 28,226,871.77 × 11,161,989.70
  4. Step 4: Simplify right side
    20,453,820.89x = 315,068,051,833,583.62
  5. Step 5: Solve for x
    x = 315,068,051,833,583.62/20,453,820.89
  6. Step 6: Final answer
    x = 15,403,872.64

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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.