Home / 21,343.81-29,454.53-12,391.69

Finding the Fourth Proportional to 21,343.81, 29,454.53 and 12,391.69

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Solution

The fourth proportional to 21,343.81, 29,454.53 and 12,391.69 is: 17,100.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.81 : 29,454.53 = 12,391.69 : x
  2. Step 2: Convert to fraction form
    21,343.81/29,454.53 = 12,391.69/x
  3. Step 3: Cross multiply
    21,343.81x = 29,454.53 × 12,391.69
  4. Step 4: Simplify right side
    21,343.81x = 364,991,404.86
  5. Step 5: Solve for x
    x = 364,991,404.86/21,343.81
  6. Step 6: Final answer
    x = 17,100.57

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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.