Home / 7,420.60-11,123.20-4,640.89

Finding the Fourth Proportional to 7,420.60, 11,123.20 and 4,640.89

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Solution

The fourth proportional to 7,420.60, 11,123.20 and 4,640.89 is: 6,956.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.60 : 11,123.20 = 4,640.89 : x
  2. Step 2: Convert to fraction form
    7,420.60/11,123.20 = 4,640.89/x
  3. Step 3: Cross multiply
    7,420.60x = 11,123.20 × 4,640.89
  4. Step 4: Simplify right side
    7,420.60x = 51,621,468.83
  5. Step 5: Solve for x
    x = 51,621,468.83/7,420.60
  6. Step 6: Final answer
    x = 6,956.51

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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.