Home / 12,679.36-19,005.86-4,780.32

Finding the Fourth Proportional to 12,679.36, 19,005.86 and 4,780.32

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Solution

The fourth proportional to 12,679.36, 19,005.86 and 4,780.32 is: 7,165.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.36 : 19,005.86 = 4,780.32 : x
  2. Step 2: Convert to fraction form
    12,679.36/19,005.86 = 4,780.32/x
  3. Step 3: Cross multiply
    12,679.36x = 19,005.86 × 4,780.32
  4. Step 4: Simplify right side
    12,679.36x = 90,854,092.68
  5. Step 5: Solve for x
    x = 90,854,092.68/12,679.36
  6. Step 6: Final answer
    x = 7,165.51

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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.