Home / 3,123.90-4,685.85-3,102.30

Finding the Fourth Proportional to 3,123.90, 4,685.85 and 3,102.30

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Solution

The fourth proportional to 3,123.90, 4,685.85 and 3,102.30 is: 4,653.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.90 : 4,685.85 = 3,102.30 : x
  2. Step 2: Convert to fraction form
    3,123.90/4,685.85 = 3,102.30/x
  3. Step 3: Cross multiply
    3,123.90x = 4,685.85 × 3,102.30
  4. Step 4: Simplify right side
    3,123.90x = 14,536,912.46
  5. Step 5: Solve for x
    x = 14,536,912.46/3,123.90
  6. Step 6: Final answer
    x = 4,653.45

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Similar ratio
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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.