Home / 12,878-19,313.16-4,979.12

Finding the Fourth Proportional to 12,878, 19,313.16 and 4,979.12

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Solution

The fourth proportional to 12,878, 19,313.16 and 4,979.12 is: 7,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878 : 19,313.16 = 4,979.12 : x
  2. Step 2: Convert to fraction form
    12,878/19,313.16 = 4,979.12/x
  3. Step 3: Cross multiply
    12,878x = 19,313.16 × 4,979.12
  4. Step 4: Simplify right side
    12,878x = 96,162,541.22
  5. Step 5: Solve for x
    x = 96,162,541.22/12,878
  6. Step 6: Final answer
    x = 7,467.20

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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.