Home / 11,688.64-16,127.68-6,972

Finding the Fourth Proportional to 11,688.64, 16,127.68 and 6,972

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Solution

The fourth proportional to 11,688.64, 16,127.68 and 6,972 is: 9,619.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,688.64 : 16,127.68 = 6,972 : x
  2. Step 2: Convert to fraction form
    11,688.64/16,127.68 = 6,972/x
  3. Step 3: Cross multiply
    11,688.64x = 16,127.68 × 6,972
  4. Step 4: Simplify right side
    11,688.64x = 112,442,184.96
  5. Step 5: Solve for x
    x = 112,442,184.96/11,688.64
  6. Step 6: Final answer
    x = 9,619.78

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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.