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Finding the Fourth Proportional to 19,798.55, 27,321.20 and 11,839.22

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Solution

The fourth proportional to 19,798.55, 27,321.20 and 11,839.22 is: 16,337.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,798.55 : 27,321.20 = 11,839.22 : x
  2. Step 2: Convert to fraction form
    19,798.55/27,321.20 = 11,839.22/x
  3. Step 3: Cross multiply
    19,798.55x = 27,321.20 × 11,839.22
  4. Step 4: Simplify right side
    19,798.55x = 323,461,697.46
  5. Step 5: Solve for x
    x = 323,461,697.46/19,798.55
  6. Step 6: Final answer
    x = 16,337.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.