Home / 20,321,393.72-28,039,905.57-11,500,803.50

Finding the Fourth Proportional to 20,321,393.72, 28,039,905.57 and 11,500,803.50

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Solution

The fourth proportional to 20,321,393.72, 28,039,905.57 and 11,500,803.50 is: 15,869,061.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321,393.72 : 28,039,905.57 = 11,500,803.50 : x
  2. Step 2: Convert to fraction form
    20,321,393.72/28,039,905.57 = 11,500,803.50/x
  3. Step 3: Cross multiply
    20,321,393.72x = 28,039,905.57 × 11,500,803.50
  4. Step 4: Simplify right side
    20,321,393.72x = 322,481,444,119,125.50
  5. Step 5: Solve for x
    x = 322,481,444,119,125.50/20,321,393.72
  6. Step 6: Final answer
    x = 15,869,061.37

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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.