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Finding the Fourth Proportional to 28,167.66, 38,849.64 and 19,666.98

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Solution

The fourth proportional to 28,167.66, 38,849.64 and 19,666.98 is: 27,125.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,167.66 : 38,849.64 = 19,666.98 : x
  2. Step 2: Convert to fraction form
    28,167.66/38,849.64 = 19,666.98/x
  3. Step 3: Cross multiply
    28,167.66x = 38,849.64 × 19,666.98
  4. Step 4: Simplify right side
    28,167.66x = 764,055,092.89
  5. Step 5: Solve for x
    x = 764,055,092.89/28,167.66
  6. Step 6: Final answer
    x = 27,125.26

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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.