Home / 21,720.60-29,979.06-16,629.66

Finding the Fourth Proportional to 21,720.60, 29,979.06 and 16,629.66

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Solution

The fourth proportional to 21,720.60, 29,979.06 and 16,629.66 is: 22,952.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.60 : 29,979.06 = 16,629.66 : x
  2. Step 2: Convert to fraction form
    21,720.60/29,979.06 = 16,629.66/x
  3. Step 3: Cross multiply
    21,720.60x = 29,979.06 × 16,629.66
  4. Step 4: Simplify right side
    21,720.60x = 498,541,574.92
  5. Step 5: Solve for x
    x = 498,541,574.92/21,720.60
  6. Step 6: Final answer
    x = 22,952.48

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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.