Home / 12,638.10-17,448.69-11,309.50

Finding the Fourth Proportional to 12,638.10, 17,448.69 and 11,309.50

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Solution

The fourth proportional to 12,638.10, 17,448.69 and 11,309.50 is: 15,614.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.10 : 17,448.69 = 11,309.50 : x
  2. Step 2: Convert to fraction form
    12,638.10/17,448.69 = 11,309.50/x
  3. Step 3: Cross multiply
    12,638.10x = 17,448.69 × 11,309.50
  4. Step 4: Simplify right side
    12,638.10x = 197,335,959.56
  5. Step 5: Solve for x
    x = 197,335,959.56/12,638.10
  6. Step 6: Final answer
    x = 15,614.37

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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.