Home / 21,405.96-29,546.16-12,455.19

Finding the Fourth Proportional to 21,405.96, 29,546.16 and 12,455.19

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Solution

The fourth proportional to 21,405.96, 29,546.16 and 12,455.19 is: 17,191.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.96 : 29,546.16 = 12,455.19 : x
  2. Step 2: Convert to fraction form
    21,405.96/29,546.16 = 12,455.19/x
  3. Step 3: Cross multiply
    21,405.96x = 29,546.16 × 12,455.19
  4. Step 4: Simplify right side
    21,405.96x = 368,003,036.57
  5. Step 5: Solve for x
    x = 368,003,036.57/21,405.96
  6. Step 6: Final answer
    x = 17,191.62

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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.