Home / 21,343.36-29,454.24-12,391.60

Finding the Fourth Proportional to 21,343.36, 29,454.24 and 12,391.60

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Solution

The fourth proportional to 21,343.36, 29,454.24 and 12,391.60 is: 17,100.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.36 : 29,454.24 = 12,391.60 : x
  2. Step 2: Convert to fraction form
    21,343.36/29,454.24 = 12,391.60/x
  3. Step 3: Cross multiply
    21,343.36x = 29,454.24 × 12,391.60
  4. Step 4: Simplify right side
    21,343.36x = 364,985,160.38
  5. Step 5: Solve for x
    x = 364,985,160.38/21,343.36
  6. Step 6: Final answer
    x = 17,100.64

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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.