Home / 11,771.70-16,255.50-8,782.35

Finding the Fourth Proportional to 11,771.70, 16,255.50 and 8,782.35

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Solution

The fourth proportional to 11,771.70, 16,255.50 and 8,782.35 is: 12,127.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,771.70 : 16,255.50 = 8,782.35 : x
  2. Step 2: Convert to fraction form
    11,771.70/16,255.50 = 8,782.35/x
  3. Step 3: Cross multiply
    11,771.70x = 16,255.50 × 8,782.35
  4. Step 4: Simplify right side
    11,771.70x = 142,761,490.43
  5. Step 5: Solve for x
    x = 142,761,490.43/11,771.70
  6. Step 6: Final answer
    x = 12,127.52

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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.