Home / 21,411.12-29,548.92-11,979.60

Finding the Fourth Proportional to 21,411.12, 29,548.92 and 11,979.60

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Solution

The fourth proportional to 21,411.12, 29,548.92 and 11,979.60 is: 16,532.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.12 : 29,548.92 = 11,979.60 : x
  2. Step 2: Convert to fraction form
    21,411.12/29,548.92 = 11,979.60/x
  3. Step 3: Cross multiply
    21,411.12x = 29,548.92 × 11,979.60
  4. Step 4: Simplify right side
    21,411.12x = 353,984,242.03
  5. Step 5: Solve for x
    x = 353,984,242.03/21,411.12
  6. Step 6: Final answer
    x = 16,532.73

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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.