Home / 21,645.80-29,871.42-12,698.60

Finding the Fourth Proportional to 21,645.80, 29,871.42 and 12,698.60

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Solution

The fourth proportional to 21,645.80, 29,871.42 and 12,698.60 is: 17,524.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.80 : 29,871.42 = 12,698.60 : x
  2. Step 2: Convert to fraction form
    21,645.80/29,871.42 = 12,698.60/x
  3. Step 3: Cross multiply
    21,645.80x = 29,871.42 × 12,698.60
  4. Step 4: Simplify right side
    21,645.80x = 379,325,214.01
  5. Step 5: Solve for x
    x = 379,325,214.01/21,645.80
  6. Step 6: Final answer
    x = 17,524.19

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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.