Home / 11,456.53-15,810.45-6,420.79

Finding the Fourth Proportional to 11,456.53, 15,810.45 and 6,420.79

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Solution

The fourth proportional to 11,456.53, 15,810.45 and 6,420.79 is: 8,860.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,456.53 : 15,810.45 = 6,420.79 : x
  2. Step 2: Convert to fraction form
    11,456.53/15,810.45 = 6,420.79/x
  3. Step 3: Cross multiply
    11,456.53x = 15,810.45 × 6,420.79
  4. Step 4: Simplify right side
    11,456.53x = 101,515,579.26
  5. Step 5: Solve for x
    x = 101,515,579.26/11,456.53
  6. Step 6: Final answer
    x = 8,860.94

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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.