Home / 3,130.28-4,695.40-2,940.20

Finding the Fourth Proportional to 3,130.28, 4,695.40 and 2,940.20

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Solution

The fourth proportional to 3,130.28, 4,695.40 and 2,940.20 is: 4,410.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.28 : 4,695.40 = 2,940.20 : x
  2. Step 2: Convert to fraction form
    3,130.28/4,695.40 = 2,940.20/x
  3. Step 3: Cross multiply
    3,130.28x = 4,695.40 × 2,940.20
  4. Step 4: Simplify right side
    3,130.28x = 13,805,415.08
  5. Step 5: Solve for x
    x = 13,805,415.08/3,130.28
  6. Step 6: Final answer
    x = 4,410.28

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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.