Home / 13,928.99-19,218.65-7,879.32

Finding the Fourth Proportional to 13,928.99, 19,218.65 and 7,879.32

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Solution

The fourth proportional to 13,928.99, 19,218.65 and 7,879.32 is: 10,871.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.99 : 19,218.65 = 7,879.32 : x
  2. Step 2: Convert to fraction form
    13,928.99/19,218.65 = 7,879.32/x
  3. Step 3: Cross multiply
    13,928.99x = 19,218.65 × 7,879.32
  4. Step 4: Simplify right side
    13,928.99x = 151,429,853.92
  5. Step 5: Solve for x
    x = 151,429,853.92/13,928.99
  6. Step 6: Final answer
    x = 10,871.56

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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.