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Finding the Fourth Proportional to 7,191.63, 10,784.19 and 2,808.99

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Solution

The fourth proportional to 7,191.63, 10,784.19 and 2,808.99 is: 4,212.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.63 : 10,784.19 = 2,808.99 : x
  2. Step 2: Convert to fraction form
    7,191.63/10,784.19 = 2,808.99/x
  3. Step 3: Cross multiply
    7,191.63x = 10,784.19 × 2,808.99
  4. Step 4: Simplify right side
    7,191.63x = 30,292,681.87
  5. Step 5: Solve for x
    x = 30,292,681.87/7,191.63
  6. Step 6: Final answer
    x = 4,212.21

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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.