Home / 13,840.15-19,099.32-7,871.80

Finding the Fourth Proportional to 13,840.15, 19,099.32 and 7,871.80

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Solution

The fourth proportional to 13,840.15, 19,099.32 and 7,871.80 is: 10,863.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.15 : 19,099.32 = 7,871.80 : x
  2. Step 2: Convert to fraction form
    13,840.15/19,099.32 = 7,871.80/x
  3. Step 3: Cross multiply
    13,840.15x = 19,099.32 × 7,871.80
  4. Step 4: Simplify right side
    13,840.15x = 150,346,027.18
  5. Step 5: Solve for x
    x = 150,346,027.18/13,840.15
  6. Step 6: Final answer
    x = 10,863.03

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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.