Home / 20,558.18-30,840.48-8,711.98

Finding the Fourth Proportional to 20,558.18, 30,840.48 and 8,711.98

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Solution

The fourth proportional to 20,558.18, 30,840.48 and 8,711.98 is: 13,069.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.18 : 30,840.48 = 8,711.98 : x
  2. Step 2: Convert to fraction form
    20,558.18/30,840.48 = 8,711.98/x
  3. Step 3: Cross multiply
    20,558.18x = 30,840.48 × 8,711.98
  4. Step 4: Simplify right side
    20,558.18x = 268,681,644.95
  5. Step 5: Solve for x
    x = 268,681,644.95/20,558.18
  6. Step 6: Final answer
    x = 13,069.33

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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.