Home / 3,123.98-4,312.48-1,945.84

Finding the Fourth Proportional to 3,123.98, 4,312.48 and 1,945.84

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Solution

The fourth proportional to 3,123.98, 4,312.48 and 1,945.84 is: 2,686.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.98 : 4,312.48 = 1,945.84 : x
  2. Step 2: Convert to fraction form
    3,123.98/4,312.48 = 1,945.84/x
  3. Step 3: Cross multiply
    3,123.98x = 4,312.48 × 1,945.84
  4. Step 4: Simplify right side
    3,123.98x = 8,391,369.66
  5. Step 5: Solve for x
    x = 8,391,369.66/3,123.98
  6. Step 6: Final answer
    x = 2,686.12

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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.