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Finding the Fourth Proportional to 7,507.40, 11,257.90 and 3,123.40

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Solution

The fourth proportional to 7,507.40, 11,257.90 and 3,123.40 is: 4,683.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,507.40 : 11,257.90 = 3,123.40 : x
  2. Step 2: Convert to fraction form
    7,507.40/11,257.90 = 3,123.40/x
  3. Step 3: Cross multiply
    7,507.40x = 11,257.90 × 3,123.40
  4. Step 4: Simplify right side
    7,507.40x = 35,162,924.86
  5. Step 5: Solve for x
    x = 35,162,924.86/7,507.40
  6. Step 6: Final answer
    x = 4,683.77

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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.