Home / 2,921.20-4,381.80-1,827.70

Finding the Fourth Proportional to 2,921.20, 4,381.80 and 1,827.70

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Solution

The fourth proportional to 2,921.20, 4,381.80 and 1,827.70 is: 2,741.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.20 : 4,381.80 = 1,827.70 : x
  2. Step 2: Convert to fraction form
    2,921.20/4,381.80 = 1,827.70/x
  3. Step 3: Cross multiply
    2,921.20x = 4,381.80 × 1,827.70
  4. Step 4: Simplify right side
    2,921.20x = 8,008,615.86
  5. Step 5: Solve for x
    x = 8,008,615.86/2,921.20
  6. Step 6: Final answer
    x = 2,741.55

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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.