Home / 12,930.64-19,399.74-4,165.36

Finding the Fourth Proportional to 12,930.64, 19,399.74 and 4,165.36

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Solution

The fourth proportional to 12,930.64, 19,399.74 and 4,165.36 is: 6,249.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.64 : 19,399.74 = 4,165.36 : x
  2. Step 2: Convert to fraction form
    12,930.64/19,399.74 = 4,165.36/x
  3. Step 3: Cross multiply
    12,930.64x = 19,399.74 × 4,165.36
  4. Step 4: Simplify right side
    12,930.64x = 80,806,901.01
  5. Step 5: Solve for x
    x = 80,806,901.01/12,930.64
  6. Step 6: Final answer
    x = 6,249.26

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1.5x scale

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.