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Finding the Fourth Proportional to 19,840.68, 29,760.84 and 5,989.68

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Solution

The fourth proportional to 19,840.68, 29,760.84 and 5,989.68 is: 8,984.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,840.68 : 29,760.84 = 5,989.68 : x
  2. Step 2: Convert to fraction form
    19,840.68/29,760.84 = 5,989.68/x
  3. Step 3: Cross multiply
    19,840.68x = 29,760.84 × 5,989.68
  4. Step 4: Simplify right side
    19,840.68x = 178,257,908.13
  5. Step 5: Solve for x
    x = 178,257,908.13/19,840.68
  6. Step 6: Final answer
    x = 8,984.47

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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.