Home / 13,178.40-18,185.40-7,512.36

Finding the Fourth Proportional to 13,178.40, 18,185.40 and 7,512.36

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Solution

The fourth proportional to 13,178.40, 18,185.40 and 7,512.36 is: 10,366.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.40 : 18,185.40 = 7,512.36 : x
  2. Step 2: Convert to fraction form
    13,178.40/18,185.40 = 7,512.36/x
  3. Step 3: Cross multiply
    13,178.40x = 18,185.40 × 7,512.36
  4. Step 4: Simplify right side
    13,178.40x = 136,615,271.54
  5. Step 5: Solve for x
    x = 136,615,271.54/13,178.40
  6. Step 6: Final answer
    x = 10,366.61

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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.