Home / 13,606.38-18,777.56-7,939.08

Finding the Fourth Proportional to 13,606.38, 18,777.56 and 7,939.08

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Solution

The fourth proportional to 13,606.38, 18,777.56 and 7,939.08 is: 10,956.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.38 : 18,777.56 = 7,939.08 : x
  2. Step 2: Convert to fraction form
    13,606.38/18,777.56 = 7,939.08/x
  3. Step 3: Cross multiply
    13,606.38x = 18,777.56 × 7,939.08
  4. Step 4: Simplify right side
    13,606.38x = 149,076,511.35
  5. Step 5: Solve for x
    x = 149,076,511.35/13,606.38
  6. Step 6: Final answer
    x = 10,956.37

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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.