Home / 7,840.40-11,756.49-4,139.58

Finding the Fourth Proportional to 7,840.40, 11,756.49 and 4,139.58

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Solution

The fourth proportional to 7,840.40, 11,756.49 and 4,139.58 is: 6,207.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.40 : 11,756.49 = 4,139.58 : x
  2. Step 2: Convert to fraction form
    7,840.40/11,756.49 = 4,139.58/x
  3. Step 3: Cross multiply
    7,840.40x = 11,756.49 × 4,139.58
  4. Step 4: Simplify right side
    7,840.40x = 48,666,949.66
  5. Step 5: Solve for x
    x = 48,666,949.66/7,840.40
  6. Step 6: Final answer
    x = 6,207.21

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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.