Home / 21,399.40-29,532.48-11,968.60

Finding the Fourth Proportional to 21,399.40, 29,532.48 and 11,968.60

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Solution

The fourth proportional to 21,399.40, 29,532.48 and 11,968.60 is: 16,517.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.40 : 29,532.48 = 11,968.60 : x
  2. Step 2: Convert to fraction form
    21,399.40/29,532.48 = 11,968.60/x
  3. Step 3: Cross multiply
    21,399.40x = 29,532.48 × 11,968.60
  4. Step 4: Simplify right side
    21,399.40x = 353,462,440.13
  5. Step 5: Solve for x
    x = 353,462,440.13/21,399.40
  6. Step 6: Final answer
    x = 16,517.40

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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.