Home / 10,487.31-15,738.26-6,780.35

Finding the Fourth Proportional to 10,487.31, 15,738.26 and 6,780.35

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Solution

The fourth proportional to 10,487.31, 15,738.26 and 6,780.35 is: 10,175.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,487.31 : 15,738.26 = 6,780.35 : x
  2. Step 2: Convert to fraction form
    10,487.31/15,738.26 = 6,780.35/x
  3. Step 3: Cross multiply
    10,487.31x = 15,738.26 × 6,780.35
  4. Step 4: Simplify right side
    10,487.31x = 106,710,837.94
  5. Step 5: Solve for x
    x = 106,710,837.94/10,487.31
  6. Step 6: Final answer
    x = 10,175.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.