Home / 12,145.39-18,208.26-5,120.87

Finding the Fourth Proportional to 12,145.39, 18,208.26 and 5,120.87

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Solution

The fourth proportional to 12,145.39, 18,208.26 and 5,120.87 is: 7,677.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.39 : 18,208.26 = 5,120.87 : x
  2. Step 2: Convert to fraction form
    12,145.39/18,208.26 = 5,120.87/x
  3. Step 3: Cross multiply
    12,145.39x = 18,208.26 × 5,120.87
  4. Step 4: Simplify right side
    12,145.39x = 93,242,132.39
  5. Step 5: Solve for x
    x = 93,242,132.39/12,145.39
  6. Step 6: Final answer
    x = 7,677.16

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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.