Home / 20,487.09-30,729.27-8,635.77

Finding the Fourth Proportional to 20,487.09, 30,729.27 and 8,635.77

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Solution

The fourth proportional to 20,487.09, 30,729.27 and 8,635.77 is: 12,953.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.09 : 30,729.27 = 8,635.77 : x
  2. Step 2: Convert to fraction form
    20,487.09/30,729.27 = 8,635.77/x
  3. Step 3: Cross multiply
    20,487.09x = 30,729.27 × 8,635.77
  4. Step 4: Simplify right side
    20,487.09x = 265,370,907.99
  5. Step 5: Solve for x
    x = 265,370,907.99/20,487.09
  6. Step 6: Final answer
    x = 12,953.08

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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.