Home / 13,687.32-18,889.06-7,638.09

Finding the Fourth Proportional to 13,687.32, 18,889.06 and 7,638.09

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Solution

The fourth proportional to 13,687.32, 18,889.06 and 7,638.09 is: 10,540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.32 : 18,889.06 = 7,638.09 : x
  2. Step 2: Convert to fraction form
    13,687.32/18,889.06 = 7,638.09/x
  3. Step 3: Cross multiply
    13,687.32x = 18,889.06 × 7,638.09
  4. Step 4: Simplify right side
    13,687.32x = 144,276,302.10
  5. Step 5: Solve for x
    x = 144,276,302.10/13,687.32
  6. Step 6: Final answer
    x = 10,540.87

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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.