Home / 13,780.53-19,015.97-7,811.24

Finding the Fourth Proportional to 13,780.53, 19,015.97 and 7,811.24

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Solution

The fourth proportional to 13,780.53, 19,015.97 and 7,811.24 is: 10,778.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.53 : 19,015.97 = 7,811.24 : x
  2. Step 2: Convert to fraction form
    13,780.53/19,015.97 = 7,811.24/x
  3. Step 3: Cross multiply
    13,780.53x = 19,015.97 × 7,811.24
  4. Step 4: Simplify right side
    13,780.53x = 148,538,171.37
  5. Step 5: Solve for x
    x = 148,538,171.37/13,780.53
  6. Step 6: Final answer
    x = 10,778.84

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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.