Home / 18,961.14-28,429.56-7,875.48

Finding the Fourth Proportional to 18,961.14, 28,429.56 and 7,875.48

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Solution

The fourth proportional to 18,961.14, 28,429.56 and 7,875.48 is: 11,808.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.14 : 28,429.56 = 7,875.48 : x
  2. Step 2: Convert to fraction form
    18,961.14/28,429.56 = 7,875.48/x
  3. Step 3: Cross multiply
    18,961.14x = 28,429.56 × 7,875.48
  4. Step 4: Simplify right side
    18,961.14x = 223,896,431.19
  5. Step 5: Solve for x
    x = 223,896,431.19/18,961.14
  6. Step 6: Final answer
    x = 11,808.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.