Home / 18,486.78-25,511.70-10,103.28

Finding the Fourth Proportional to 18,486.78, 25,511.70 and 10,103.28

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Solution

The fourth proportional to 18,486.78, 25,511.70 and 10,103.28 is: 13,942.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.78 : 25,511.70 = 10,103.28 : x
  2. Step 2: Convert to fraction form
    18,486.78/25,511.70 = 10,103.28/x
  3. Step 3: Cross multiply
    18,486.78x = 25,511.70 × 10,103.28
  4. Step 4: Simplify right side
    18,486.78x = 257,751,848.38
  5. Step 5: Solve for x
    x = 257,751,848.38/18,486.78
  6. Step 6: Final answer
    x = 13,942.50

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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.