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Finding the Fourth Proportional to 7,155.79, 10,732.46 and 1,890.86

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Solution

The fourth proportional to 7,155.79, 10,732.46 and 1,890.86 is: 2,835.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.79 : 10,732.46 = 1,890.86 : x
  2. Step 2: Convert to fraction form
    7,155.79/10,732.46 = 1,890.86/x
  3. Step 3: Cross multiply
    7,155.79x = 10,732.46 × 1,890.86
  4. Step 4: Simplify right side
    7,155.79x = 20,293,530.38
  5. Step 5: Solve for x
    x = 20,293,530.38/7,155.79
  6. Step 6: Final answer
    x = 2,835.96

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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.