Home / 2,135.08-2,947.84-1,338.72

Finding the Fourth Proportional to 2,135.08, 2,947.84 and 1,338.72

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Solution

The fourth proportional to 2,135.08, 2,947.84 and 1,338.72 is: 1,848.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.08 : 2,947.84 = 1,338.72 : x
  2. Step 2: Convert to fraction form
    2,135.08/2,947.84 = 1,338.72/x
  3. Step 3: Cross multiply
    2,135.08x = 2,947.84 × 1,338.72
  4. Step 4: Simplify right side
    2,135.08x = 3,946,332.36
  5. Step 5: Solve for x
    x = 3,946,332.36/2,135.08
  6. Step 6: Final answer
    x = 1,848.33

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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.