Home / 2,091.24-2,884.86-1,428.12

Finding the Fourth Proportional to 2,091.24, 2,884.86 and 1,428.12

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Solution

The fourth proportional to 2,091.24, 2,884.86 and 1,428.12 is: 1,970.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.24 : 2,884.86 = 1,428.12 : x
  2. Step 2: Convert to fraction form
    2,091.24/2,884.86 = 1,428.12/x
  3. Step 3: Cross multiply
    2,091.24x = 2,884.86 × 1,428.12
  4. Step 4: Simplify right side
    2,091.24x = 4,119,926.26
  5. Step 5: Solve for x
    x = 4,119,926.26/2,091.24
  6. Step 6: Final answer
    x = 1,970.09

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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.