Home / 21,171-29,216.15-11,739.57

Finding the Fourth Proportional to 21,171, 29,216.15 and 11,739.57

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Solution

The fourth proportional to 21,171, 29,216.15 and 11,739.57 is: 16,200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171 : 29,216.15 = 11,739.57 : x
  2. Step 2: Convert to fraction form
    21,171/29,216.15 = 11,739.57/x
  3. Step 3: Cross multiply
    21,171x = 29,216.15 × 11,739.57
  4. Step 4: Simplify right side
    21,171x = 342,984,979.36
  5. Step 5: Solve for x
    x = 342,984,979.36/21,171
  6. Step 6: Final answer
    x = 16,200.70

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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.