Home / 2,980.05-4,108.67-2,130.30

Finding the Fourth Proportional to 2,980.05, 4,108.67 and 2,130.30

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Solution

The fourth proportional to 2,980.05, 4,108.67 and 2,130.30 is: 2,937.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.05 : 4,108.67 = 2,130.30 : x
  2. Step 2: Convert to fraction form
    2,980.05/4,108.67 = 2,130.30/x
  3. Step 3: Cross multiply
    2,980.05x = 4,108.67 × 2,130.30
  4. Step 4: Simplify right side
    2,980.05x = 8,752,689.05
  5. Step 5: Solve for x
    x = 8,752,689.05/2,980.05
  6. Step 6: Final answer
    x = 2,937.09

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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.