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Finding the Fourth Proportional to 14,978,378.92, 20,670,117.86 and 8,102,859.08

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Solution

The fourth proportional to 14,978,378.92, 20,670,117.86 and 8,102,859.08 is: 11,181,921.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978,378.92 : 20,670,117.86 = 8,102,859.08 : x
  2. Step 2: Convert to fraction form
    14,978,378.92/20,670,117.86 = 8,102,859.08/x
  3. Step 3: Cross multiply
    14,978,378.92x = 20,670,117.86 × 8,102,859.08
  4. Step 4: Simplify right side
    14,978,378.92x = 167,487,052,186,571.16
  5. Step 5: Solve for x
    x = 167,487,052,186,571.16/14,978,378.92
  6. Step 6: Final answer
    x = 11,181,921.16

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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.