Home / 19,875.15-27,419.94-11,372.72

Finding the Fourth Proportional to 19,875.15, 27,419.94 and 11,372.72

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Solution

The fourth proportional to 19,875.15, 27,419.94 and 11,372.72 is: 15,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,875.15 : 27,419.94 = 11,372.72 : x
  2. Step 2: Convert to fraction form
    19,875.15/27,419.94 = 11,372.72/x
  3. Step 3: Cross multiply
    19,875.15x = 27,419.94 × 11,372.72
  4. Step 4: Simplify right side
    19,875.15x = 311,839,162.94
  5. Step 5: Solve for x
    x = 311,839,162.94/19,875.15
  6. Step 6: Final answer
    x = 15,689.90

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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.