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Finding the Fourth Proportional to 8,636.78, 12,953.25 and 3,090.50

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Solution

The fourth proportional to 8,636.78, 12,953.25 and 3,090.50 is: 4,635.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.78 : 12,953.25 = 3,090.50 : x
  2. Step 2: Convert to fraction form
    8,636.78/12,953.25 = 3,090.50/x
  3. Step 3: Cross multiply
    8,636.78x = 12,953.25 × 3,090.50
  4. Step 4: Simplify right side
    8,636.78x = 40,031,954.36
  5. Step 5: Solve for x
    x = 40,031,954.36/8,636.78
  6. Step 6: Final answer
    x = 4,635.06

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1.5x scale

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.