Home / 3,005.12-4,142.40-2,946.80

Finding the Fourth Proportional to 3,005.12, 4,142.40 and 2,946.80

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Solution

The fourth proportional to 3,005.12, 4,142.40 and 2,946.80 is: 4,062.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.12 : 4,142.40 = 2,946.80 : x
  2. Step 2: Convert to fraction form
    3,005.12/4,142.40 = 2,946.80/x
  3. Step 3: Cross multiply
    3,005.12x = 4,142.40 × 2,946.80
  4. Step 4: Simplify right side
    3,005.12x = 12,206,824.32
  5. Step 5: Solve for x
    x = 12,206,824.32/3,005.12
  6. Step 6: Final answer
    x = 4,062.01

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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.