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Finding the Fourth Proportional to 5,412.79, 8,117.79 and 2,125.90

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Solution

The fourth proportional to 5,412.79, 8,117.79 and 2,125.90 is: 3,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.79 : 8,117.79 = 2,125.90 : x
  2. Step 2: Convert to fraction form
    5,412.79/8,117.79 = 2,125.90/x
  3. Step 3: Cross multiply
    5,412.79x = 8,117.79 × 2,125.90
  4. Step 4: Simplify right side
    5,412.79x = 17,257,609.76
  5. Step 5: Solve for x
    x = 17,257,609.76/5,412.79
  6. Step 6: Final answer
    x = 3,188.30

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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.