Home / 12,920.64-19,379.88-5,127.36

Finding the Fourth Proportional to 12,920.64, 19,379.88 and 5,127.36

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Solution

The fourth proportional to 12,920.64, 19,379.88 and 5,127.36 is: 7,690.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.64 : 19,379.88 = 5,127.36 : x
  2. Step 2: Convert to fraction form
    12,920.64/19,379.88 = 5,127.36/x
  3. Step 3: Cross multiply
    12,920.64x = 19,379.88 × 5,127.36
  4. Step 4: Simplify right side
    12,920.64x = 99,367,621.52
  5. Step 5: Solve for x
    x = 99,367,621.52/12,920.64
  6. Step 6: Final answer
    x = 7,690.61

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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.