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Finding the Fourth Proportional to 14,046.55, 20,978.66 and 12,727.69

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Solution

The fourth proportional to 14,046.55, 20,978.66 and 12,727.69 is: 19,008.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,046.55 : 20,978.66 = 12,727.69 : x
  2. Step 2: Convert to fraction form
    14,046.55/20,978.66 = 12,727.69/x
  3. Step 3: Cross multiply
    14,046.55x = 20,978.66 × 12,727.69
  4. Step 4: Simplify right side
    14,046.55x = 267,009,881.10
  5. Step 5: Solve for x
    x = 267,009,881.10/14,046.55
  6. Step 6: Final answer
    x = 19,008.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.