Home / 3,123.78-4,312.55-2,130.52

Finding the Fourth Proportional to 3,123.78, 4,312.55 and 2,130.52

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Solution

The fourth proportional to 3,123.78, 4,312.55 and 2,130.52 is: 2,941.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.78 : 4,312.55 = 2,130.52 : x
  2. Step 2: Convert to fraction form
    3,123.78/4,312.55 = 2,130.52/x
  3. Step 3: Cross multiply
    3,123.78x = 4,312.55 × 2,130.52
  4. Step 4: Simplify right side
    3,123.78x = 9,187,974.03
  5. Step 5: Solve for x
    x = 9,187,974.03/3,123.78
  6. Step 6: Final answer
    x = 2,941.30

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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.