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Finding the Fourth Proportional to 18,978.77, 26,190.84 and 10,480.66

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Solution

The fourth proportional to 18,978.77, 26,190.84 and 10,480.66 is: 14,463.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.77 : 26,190.84 = 10,480.66 : x
  2. Step 2: Convert to fraction form
    18,978.77/26,190.84 = 10,480.66/x
  3. Step 3: Cross multiply
    18,978.77x = 26,190.84 × 10,480.66
  4. Step 4: Simplify right side
    18,978.77x = 274,497,262.98
  5. Step 5: Solve for x
    x = 274,497,262.98/18,978.77
  6. Step 6: Final answer
    x = 14,463.38

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1.5x scale

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.