Home / 12,390.48-17,102.14-7,672.08

Finding the Fourth Proportional to 12,390.48, 17,102.14 and 7,672.08

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Solution

The fourth proportional to 12,390.48, 17,102.14 and 7,672.08 is: 10,589.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.48 : 17,102.14 = 7,672.08 : x
  2. Step 2: Convert to fraction form
    12,390.48/17,102.14 = 7,672.08/x
  3. Step 3: Cross multiply
    12,390.48x = 17,102.14 × 7,672.08
  4. Step 4: Simplify right side
    12,390.48x = 131,208,986.25
  5. Step 5: Solve for x
    x = 131,208,986.25/12,390.48
  6. Step 6: Final answer
    x = 10,589.50

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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.