Home / 21,622.80-29,839.68-12,675.60

Finding the Fourth Proportional to 21,622.80, 29,839.68 and 12,675.60

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Solution

The fourth proportional to 21,622.80, 29,839.68 and 12,675.60 is: 17,492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.80 : 29,839.68 = 12,675.60 : x
  2. Step 2: Convert to fraction form
    21,622.80/29,839.68 = 12,675.60/x
  3. Step 3: Cross multiply
    21,622.80x = 29,839.68 × 12,675.60
  4. Step 4: Simplify right side
    21,622.80x = 378,235,847.81
  5. Step 5: Solve for x
    x = 378,235,847.81/21,622.80
  6. Step 6: Final answer
    x = 17,492.45

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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.