Home / 13,909.20-19,193.67-7,939.77

Finding the Fourth Proportional to 13,909.20, 19,193.67 and 7,939.77

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Solution

The fourth proportional to 13,909.20, 19,193.67 and 7,939.77 is: 10,956.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.20 : 19,193.67 = 7,939.77 : x
  2. Step 2: Convert to fraction form
    13,909.20/19,193.67 = 7,939.77/x
  3. Step 3: Cross multiply
    13,909.20x = 19,193.67 × 7,939.77
  4. Step 4: Simplify right side
    13,909.20x = 152,393,325.26
  5. Step 5: Solve for x
    x = 152,393,325.26/13,909.20
  6. Step 6: Final answer
    x = 10,956.30

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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.