Home / 13,856.45-19,121.60-7,807

Finding the Fourth Proportional to 13,856.45, 19,121.60 and 7,807

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Solution

The fourth proportional to 13,856.45, 19,121.60 and 7,807 is: 10,773.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.45 : 19,121.60 = 7,807 : x
  2. Step 2: Convert to fraction form
    13,856.45/19,121.60 = 7,807/x
  3. Step 3: Cross multiply
    13,856.45x = 19,121.60 × 7,807
  4. Step 4: Simplify right side
    13,856.45x = 149,282,331.20
  5. Step 5: Solve for x
    x = 149,282,331.20/13,856.45
  6. Step 6: Final answer
    x = 10,773.49

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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.