Home / 21,381.96-29,507.22-12,429.62

Finding the Fourth Proportional to 21,381.96, 29,507.22 and 12,429.62

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Solution

The fourth proportional to 21,381.96, 29,507.22 and 12,429.62 is: 17,152.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.96 : 29,507.22 = 12,429.62 : x
  2. Step 2: Convert to fraction form
    21,381.96/29,507.22 = 12,429.62/x
  3. Step 3: Cross multiply
    21,381.96x = 29,507.22 × 12,429.62
  4. Step 4: Simplify right side
    21,381.96x = 366,763,531.86
  5. Step 5: Solve for x
    x = 366,763,531.86/21,381.96
  6. Step 6: Final answer
    x = 17,152.94

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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.