Home / 12,627.90-18,939.56-6,390.63

Finding the Fourth Proportional to 12,627.90, 18,939.56 and 6,390.63

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Solution

The fourth proportional to 12,627.90, 18,939.56 and 6,390.63 is: 9,584.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,627.90 : 18,939.56 = 6,390.63 : x
  2. Step 2: Convert to fraction form
    12,627.90/18,939.56 = 6,390.63/x
  3. Step 3: Cross multiply
    12,627.90x = 18,939.56 × 6,390.63
  4. Step 4: Simplify right side
    12,627.90x = 121,035,688.37
  5. Step 5: Solve for x
    x = 121,035,688.37/12,627.90
  6. Step 6: Final answer
    x = 9,584.78

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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.