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Finding the Fourth Proportional to 18,978.84, 26,190.42 and 10,480.47

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Solution

The fourth proportional to 18,978.84, 26,190.42 and 10,480.47 is: 14,462.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.84 : 26,190.42 = 10,480.47 : x
  2. Step 2: Convert to fraction form
    18,978.84/26,190.42 = 10,480.47/x
  3. Step 3: Cross multiply
    18,978.84x = 26,190.42 × 10,480.47
  4. Step 4: Simplify right side
    18,978.84x = 274,487,911.10
  5. Step 5: Solve for x
    x = 274,487,911.10/18,978.84
  6. Step 6: Final answer
    x = 14,462.84

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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.