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Finding the Fourth Proportional to 19,388.84, 26,755.88 and 11,847.78

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Solution

The fourth proportional to 19,388.84, 26,755.88 and 11,847.78 is: 16,349.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,388.84 : 26,755.88 = 11,847.78 : x
  2. Step 2: Convert to fraction form
    19,388.84/26,755.88 = 11,847.78/x
  3. Step 3: Cross multiply
    19,388.84x = 26,755.88 × 11,847.78
  4. Step 4: Simplify right side
    19,388.84x = 316,997,720.71
  5. Step 5: Solve for x
    x = 316,997,720.71/19,388.84
  6. Step 6: Final answer
    x = 16,349.50

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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.