Home / 5,123.70-7,069.82-2,885.40

Finding the Fourth Proportional to 5,123.70, 7,069.82 and 2,885.40

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Solution

The fourth proportional to 5,123.70, 7,069.82 and 2,885.40 is: 3,981.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.70 : 7,069.82 = 2,885.40 : x
  2. Step 2: Convert to fraction form
    5,123.70/7,069.82 = 2,885.40/x
  3. Step 3: Cross multiply
    5,123.70x = 7,069.82 × 2,885.40
  4. Step 4: Simplify right side
    5,123.70x = 20,399,244.20
  5. Step 5: Solve for x
    x = 20,399,244.20/5,123.70
  6. Step 6: Final answer
    x = 3,981.35

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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.