Home / 21,688.17-29,932.32-12,736.50

Finding the Fourth Proportional to 21,688.17, 29,932.32 and 12,736.50

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Solution

The fourth proportional to 21,688.17, 29,932.32 and 12,736.50 is: 17,577.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.17 : 29,932.32 = 12,736.50 : x
  2. Step 2: Convert to fraction form
    21,688.17/29,932.32 = 12,736.50/x
  3. Step 3: Cross multiply
    21,688.17x = 29,932.32 × 12,736.50
  4. Step 4: Simplify right side
    21,688.17x = 381,232,993.68
  5. Step 5: Solve for x
    x = 381,232,993.68/21,688.17
  6. Step 6: Final answer
    x = 17,577.92

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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.