Home / 13,409.79-18,439.89-11,638.32

Finding the Fourth Proportional to 13,409.79, 18,439.89 and 11,638.32

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Solution

The fourth proportional to 13,409.79, 18,439.89 and 11,638.32 is: 16,003.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.79 : 18,439.89 = 11,638.32 : x
  2. Step 2: Convert to fraction form
    13,409.79/18,439.89 = 11,638.32/x
  3. Step 3: Cross multiply
    13,409.79x = 18,439.89 × 11,638.32
  4. Step 4: Simplify right side
    13,409.79x = 214,609,340.58
  5. Step 5: Solve for x
    x = 214,609,340.58/13,409.79
  6. Step 6: Final answer
    x = 16,003.93

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1.5x scale

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.