Home / 13,870.20-19,138.64-7,901.96

Finding the Fourth Proportional to 13,870.20, 19,138.64 and 7,901.96

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Solution

The fourth proportional to 13,870.20, 19,138.64 and 7,901.96 is: 10,903.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.20 : 19,138.64 = 7,901.96 : x
  2. Step 2: Convert to fraction form
    13,870.20/19,138.64 = 7,901.96/x
  3. Step 3: Cross multiply
    13,870.20x = 19,138.64 × 7,901.96
  4. Step 4: Simplify right side
    13,870.20x = 151,232,767.73
  5. Step 5: Solve for x
    x = 151,232,767.73/13,870.20
  6. Step 6: Final answer
    x = 10,903.43

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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.