Home / 12,568.22-18,708.66-12,381.38

Finding the Fourth Proportional to 12,568.22, 18,708.66 and 12,381.38

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Solution

The fourth proportional to 12,568.22, 18,708.66 and 12,381.38 is: 18,430.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,568.22 : 18,708.66 = 12,381.38 : x
  2. Step 2: Convert to fraction form
    12,568.22/18,708.66 = 12,381.38/x
  3. Step 3: Cross multiply
    12,568.22x = 18,708.66 × 12,381.38
  4. Step 4: Simplify right side
    12,568.22x = 231,638,966.84
  5. Step 5: Solve for x
    x = 231,638,966.84/12,568.22
  6. Step 6: Final answer
    x = 18,430.53

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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.