Home / 3,142.08-4,330.56-2,780.04

Finding the Fourth Proportional to 3,142.08, 4,330.56 and 2,780.04

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Solution

The fourth proportional to 3,142.08, 4,330.56 and 2,780.04 is: 3,831.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,142.08 : 4,330.56 = 2,780.04 : x
  2. Step 2: Convert to fraction form
    3,142.08/4,330.56 = 2,780.04/x
  3. Step 3: Cross multiply
    3,142.08x = 4,330.56 × 2,780.04
  4. Step 4: Simplify right side
    3,142.08x = 12,039,130.02
  5. Step 5: Solve for x
    x = 12,039,130.02/3,142.08
  6. Step 6: Final answer
    x = 3,831.58

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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.