Home / 12,603.36-17,385.40-7,879.44

Finding the Fourth Proportional to 12,603.36, 17,385.40 and 7,879.44

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Solution

The fourth proportional to 12,603.36, 17,385.40 and 7,879.44 is: 10,869.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.36 : 17,385.40 = 7,879.44 : x
  2. Step 2: Convert to fraction form
    12,603.36/17,385.40 = 7,879.44/x
  3. Step 3: Cross multiply
    12,603.36x = 17,385.40 × 7,879.44
  4. Step 4: Simplify right side
    12,603.36x = 136,987,291.22
  5. Step 5: Solve for x
    x = 136,987,291.22/12,603.36
  6. Step 6: Final answer
    x = 10,869.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.