Home / 2,909.60-4,013.95-1,939.68

Finding the Fourth Proportional to 2,909.60, 4,013.95 and 1,939.68

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Solution

The fourth proportional to 2,909.60, 4,013.95 and 1,939.68 is: 2,675.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.60 : 4,013.95 = 1,939.68 : x
  2. Step 2: Convert to fraction form
    2,909.60/4,013.95 = 1,939.68/x
  3. Step 3: Cross multiply
    2,909.60x = 4,013.95 × 1,939.68
  4. Step 4: Simplify right side
    2,909.60x = 7,785,768.84
  5. Step 5: Solve for x
    x = 7,785,768.84/2,909.60
  6. Step 6: Final answer
    x = 2,675.89

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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.