Home / 2,127.60-3,191.40-1,969.20

Finding the Fourth Proportional to 2,127.60, 3,191.40 and 1,969.20

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Solution

The fourth proportional to 2,127.60, 3,191.40 and 1,969.20 is: 2,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.60 : 3,191.40 = 1,969.20 : x
  2. Step 2: Convert to fraction form
    2,127.60/3,191.40 = 1,969.20/x
  3. Step 3: Cross multiply
    2,127.60x = 3,191.40 × 1,969.20
  4. Step 4: Simplify right side
    2,127.60x = 6,284,504.88
  5. Step 5: Solve for x
    x = 6,284,504.88/2,127.60
  6. Step 6: Final answer
    x = 2,953.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.