Home / 15,485.25-21,369.61-8,770.86

Finding the Fourth Proportional to 15,485.25, 21,369.61 and 8,770.86

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Solution

The fourth proportional to 15,485.25, 21,369.61 and 8,770.86 is: 12,103.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.25 : 21,369.61 = 8,770.86 : x
  2. Step 2: Convert to fraction form
    15,485.25/21,369.61 = 8,770.86/x
  3. Step 3: Cross multiply
    15,485.25x = 21,369.61 × 8,770.86
  4. Step 4: Simplify right side
    15,485.25x = 187,429,857.56
  5. Step 5: Solve for x
    x = 187,429,857.56/15,485.25
  6. Step 6: Final answer
    x = 12,103.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.