Home / 13,856.32-19,121.74-7,887.98

Finding the Fourth Proportional to 13,856.32, 19,121.74 and 7,887.98

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Solution

The fourth proportional to 13,856.32, 19,121.74 and 7,887.98 is: 10,885.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.32 : 19,121.74 = 7,887.98 : x
  2. Step 2: Convert to fraction form
    13,856.32/19,121.74 = 7,887.98/x
  3. Step 3: Cross multiply
    13,856.32x = 19,121.74 × 7,887.98
  4. Step 4: Simplify right side
    13,856.32x = 150,831,863.25
  5. Step 5: Solve for x
    x = 150,831,863.25/13,856.32
  6. Step 6: Final answer
    x = 10,885.42

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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.