Home / 12,425.07-17,147.31-7,120.77

Finding the Fourth Proportional to 12,425.07, 17,147.31 and 7,120.77

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Solution

The fourth proportional to 12,425.07, 17,147.31 and 7,120.77 is: 9,827.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.07 : 17,147.31 = 7,120.77 : x
  2. Step 2: Convert to fraction form
    12,425.07/17,147.31 = 7,120.77/x
  3. Step 3: Cross multiply
    12,425.07x = 17,147.31 × 7,120.77
  4. Step 4: Simplify right side
    12,425.07x = 122,102,050.63
  5. Step 5: Solve for x
    x = 122,102,050.63/12,425.07
  6. Step 6: Final answer
    x = 9,827.07

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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.