Home / 12,291.63-18,435.87-3,970.78

Finding the Fourth Proportional to 12,291.63, 18,435.87 and 3,970.78

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Solution

The fourth proportional to 12,291.63, 18,435.87 and 3,970.78 is: 5,955.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,291.63 : 18,435.87 = 3,970.78 : x
  2. Step 2: Convert to fraction form
    12,291.63/18,435.87 = 3,970.78/x
  3. Step 3: Cross multiply
    12,291.63x = 18,435.87 × 3,970.78
  4. Step 4: Simplify right side
    12,291.63x = 73,204,783.88
  5. Step 5: Solve for x
    x = 73,204,783.88/12,291.63
  6. Step 6: Final answer
    x = 5,955.66

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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.