Home / 3,123.10-4,312.36-1,929.82

Finding the Fourth Proportional to 3,123.10, 4,312.36 and 1,929.82

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Solution

The fourth proportional to 3,123.10, 4,312.36 and 1,929.82 is: 2,664.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.10 : 4,312.36 = 1,929.82 : x
  2. Step 2: Convert to fraction form
    3,123.10/4,312.36 = 1,929.82/x
  3. Step 3: Cross multiply
    3,123.10x = 4,312.36 × 1,929.82
  4. Step 4: Simplify right side
    3,123.10x = 8,322,062.97
  5. Step 5: Solve for x
    x = 8,322,062.97/3,123.10
  6. Step 6: Final answer
    x = 2,664.68

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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.