Home / 21,851.41-30,154.64-12,290.57

Finding the Fourth Proportional to 21,851.41, 30,154.64 and 12,290.57

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Solution

The fourth proportional to 21,851.41, 30,154.64 and 12,290.57 is: 16,960.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.41 : 30,154.64 = 12,290.57 : x
  2. Step 2: Convert to fraction form
    21,851.41/30,154.64 = 12,290.57/x
  3. Step 3: Cross multiply
    21,851.41x = 30,154.64 × 12,290.57
  4. Step 4: Simplify right side
    21,851.41x = 370,617,713.74
  5. Step 5: Solve for x
    x = 370,617,713.74/21,851.41
  6. Step 6: Final answer
    x = 16,960.81

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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.