Home / 21,705.30-29,970.30-16,661.54

Finding the Fourth Proportional to 21,705.30, 29,970.30 and 16,661.54

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Solution

The fourth proportional to 21,705.30, 29,970.30 and 16,661.54 is: 23,005.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.30 : 29,970.30 = 16,661.54 : x
  2. Step 2: Convert to fraction form
    21,705.30/29,970.30 = 16,661.54/x
  3. Step 3: Cross multiply
    21,705.30x = 29,970.30 × 16,661.54
  4. Step 4: Simplify right side
    21,705.30x = 499,351,352.26
  5. Step 5: Solve for x
    x = 499,351,352.26/21,705.30
  6. Step 6: Final answer
    x = 23,005.96

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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.