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Finding the Fourth Proportional to 5,805.68, 8,707.08 and 1,912.40

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Solution

The fourth proportional to 5,805.68, 8,707.08 and 1,912.40 is: 2,868.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,805.68 : 8,707.08 = 1,912.40 : x
  2. Step 2: Convert to fraction form
    5,805.68/8,707.08 = 1,912.40/x
  3. Step 3: Cross multiply
    5,805.68x = 8,707.08 × 1,912.40
  4. Step 4: Simplify right side
    5,805.68x = 16,651,419.79
  5. Step 5: Solve for x
    x = 16,651,419.79/5,805.68
  6. Step 6: Final answer
    x = 2,868.13

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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.