Home / 20,518.98-30,782.60-7,867.82

Finding the Fourth Proportional to 20,518.98, 30,782.60 and 7,867.82

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Solution

The fourth proportional to 20,518.98, 30,782.60 and 7,867.82 is: 11,803.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.98 : 30,782.60 = 7,867.82 : x
  2. Step 2: Convert to fraction form
    20,518.98/30,782.60 = 7,867.82/x
  3. Step 3: Cross multiply
    20,518.98x = 30,782.60 × 7,867.82
  4. Step 4: Simplify right side
    20,518.98x = 242,191,955.93
  5. Step 5: Solve for x
    x = 242,191,955.93/20,518.98
  6. Step 6: Final answer
    x = 11,803.31

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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.