Home / 21,708.96-29,951.76-13,322.40

Finding the Fourth Proportional to 21,708.96, 29,951.76 and 13,322.40

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Solution

The fourth proportional to 21,708.96, 29,951.76 and 13,322.40 is: 18,380.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708.96 : 29,951.76 = 13,322.40 : x
  2. Step 2: Convert to fraction form
    21,708.96/29,951.76 = 13,322.40/x
  3. Step 3: Cross multiply
    21,708.96x = 29,951.76 × 13,322.40
  4. Step 4: Simplify right side
    21,708.96x = 399,029,327.42
  5. Step 5: Solve for x
    x = 399,029,327.42/21,708.96
  6. Step 6: Final answer
    x = 18,380.86

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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.