Home / 2,127.92-2,934.96-1,428.08

Finding the Fourth Proportional to 2,127.92, 2,934.96 and 1,428.08

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Solution

The fourth proportional to 2,127.92, 2,934.96 and 1,428.08 is: 1,969.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.92 : 2,934.96 = 1,428.08 : x
  2. Step 2: Convert to fraction form
    2,127.92/2,934.96 = 1,428.08/x
  3. Step 3: Cross multiply
    2,127.92x = 2,934.96 × 1,428.08
  4. Step 4: Simplify right side
    2,127.92x = 4,191,357.68
  5. Step 5: Solve for x
    x = 4,191,357.68/2,127.92
  6. Step 6: Final answer
    x = 1,969.70

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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.