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Finding the Fourth Proportional to 20,655.99, 30,983.94 and 5,865.05

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Solution

The fourth proportional to 20,655.99, 30,983.94 and 5,865.05 is: 8,797.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.99 : 30,983.94 = 5,865.05 : x
  2. Step 2: Convert to fraction form
    20,655.99/30,983.94 = 5,865.05/x
  3. Step 3: Cross multiply
    20,655.99x = 30,983.94 × 5,865.05
  4. Step 4: Simplify right side
    20,655.99x = 181,722,434.76
  5. Step 5: Solve for x
    x = 181,722,434.76/20,655.99
  6. Step 6: Final answer
    x = 8,797.57

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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.