Home / 13,856.96-19,121.68-7,887.84

Finding the Fourth Proportional to 13,856.96, 19,121.68 and 7,887.84

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Solution

The fourth proportional to 13,856.96, 19,121.68 and 7,887.84 is: 10,884.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.96 : 19,121.68 = 7,887.84 : x
  2. Step 2: Convert to fraction form
    13,856.96/19,121.68 = 7,887.84/x
  3. Step 3: Cross multiply
    13,856.96x = 19,121.68 × 7,887.84
  4. Step 4: Simplify right side
    13,856.96x = 150,828,752.37
  5. Step 5: Solve for x
    x = 150,828,752.37/13,856.96
  6. Step 6: Final answer
    x = 10,884.69

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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.