Home / 12,739.08-17,578.96-7,149

Finding the Fourth Proportional to 12,739.08, 17,578.96 and 7,149

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Solution

The fourth proportional to 12,739.08, 17,578.96 and 7,149 is: 9,865.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.08 : 17,578.96 = 7,149 : x
  2. Step 2: Convert to fraction form
    12,739.08/17,578.96 = 7,149/x
  3. Step 3: Cross multiply
    12,739.08x = 17,578.96 × 7,149
  4. Step 4: Simplify right side
    12,739.08x = 125,671,985.04
  5. Step 5: Solve for x
    x = 125,671,985.04/12,739.08
  6. Step 6: Final answer
    x = 9,865.08

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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.