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Finding the Fourth Proportional to 18,910.84, 28,358 and 5,760.16

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Solution

The fourth proportional to 18,910.84, 28,358 and 5,760.16 is: 8,637.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.84 : 28,358 = 5,760.16 : x
  2. Step 2: Convert to fraction form
    18,910.84/28,358 = 5,760.16/x
  3. Step 3: Cross multiply
    18,910.84x = 28,358 × 5,760.16
  4. Step 4: Simplify right side
    18,910.84x = 163,346,617.28
  5. Step 5: Solve for x
    x = 163,346,617.28/18,910.84
  6. Step 6: Final answer
    x = 8,637.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.