Home / 12,790.18-17,650.40-7,125

Finding the Fourth Proportional to 12,790.18, 17,650.40 and 7,125

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Solution

The fourth proportional to 12,790.18, 17,650.40 and 7,125 is: 9,832.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.18 : 17,650.40 = 7,125 : x
  2. Step 2: Convert to fraction form
    12,790.18/17,650.40 = 7,125/x
  3. Step 3: Cross multiply
    12,790.18x = 17,650.40 × 7,125
  4. Step 4: Simplify right side
    12,790.18x = 125,759,100.00
  5. Step 5: Solve for x
    x = 125,759,100.00/12,790.18
  6. Step 6: Final answer
    x = 9,832.47

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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.