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Finding the Fourth Proportional to 18,775.84, 25,911.20 and 10,392.32

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Solution

The fourth proportional to 18,775.84, 25,911.20 and 10,392.32 is: 14,341.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.84 : 25,911.20 = 10,392.32 : x
  2. Step 2: Convert to fraction form
    18,775.84/25,911.20 = 10,392.32/x
  3. Step 3: Cross multiply
    18,775.84x = 25,911.20 × 10,392.32
  4. Step 4: Simplify right side
    18,775.84x = 269,277,481.98
  5. Step 5: Solve for x
    x = 269,277,481.98/18,775.84
  6. Step 6: Final answer
    x = 14,341.70

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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.