Home / 12,712.68-18,975.51-11,821.32

Finding the Fourth Proportional to 12,712.68, 18,975.51 and 11,821.32

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Solution

The fourth proportional to 12,712.68, 18,975.51 and 11,821.32 is: 17,645.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.68 : 18,975.51 = 11,821.32 : x
  2. Step 2: Convert to fraction form
    12,712.68/18,975.51 = 11,821.32/x
  3. Step 3: Cross multiply
    12,712.68x = 18,975.51 × 11,821.32
  4. Step 4: Simplify right side
    12,712.68x = 224,315,575.87
  5. Step 5: Solve for x
    x = 224,315,575.87/12,712.68
  6. Step 6: Final answer
    x = 17,645.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.