Home / 13,778.24-19,015.14-7,811

Finding the Fourth Proportional to 13,778.24, 19,015.14 and 7,811

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Solution

The fourth proportional to 13,778.24, 19,015.14 and 7,811 is: 10,779.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.24 : 19,015.14 = 7,811 : x
  2. Step 2: Convert to fraction form
    13,778.24/19,015.14 = 7,811/x
  3. Step 3: Cross multiply
    13,778.24x = 19,015.14 × 7,811
  4. Step 4: Simplify right side
    13,778.24x = 148,527,258.54
  5. Step 5: Solve for x
    x = 148,527,258.54/13,778.24
  6. Step 6: Final answer
    x = 10,779.84

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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.