Home / 12,661.28-18,984-4,860.80

Finding the Fourth Proportional to 12,661.28, 18,984 and 4,860.80

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Solution

The fourth proportional to 12,661.28, 18,984 and 4,860.80 is: 7,288.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.28 : 18,984 = 4,860.80 : x
  2. Step 2: Convert to fraction form
    12,661.28/18,984 = 4,860.80/x
  3. Step 3: Cross multiply
    12,661.28x = 18,984 × 4,860.80
  4. Step 4: Simplify right side
    12,661.28x = 92,277,427.20
  5. Step 5: Solve for x
    x = 92,277,427.20/12,661.28
  6. Step 6: Final answer
    x = 7,288.16

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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.