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Finding the Fourth Proportional to 28,499.36, 39,327.89 and 15,751.89

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Solution

The fourth proportional to 28,499.36, 39,327.89 and 15,751.89 is: 21,736.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.36 : 39,327.89 = 15,751.89 : x
  2. Step 2: Convert to fraction form
    28,499.36/39,327.89 = 15,751.89/x
  3. Step 3: Cross multiply
    28,499.36x = 39,327.89 × 15,751.89
  4. Step 4: Simplify right side
    28,499.36x = 619,488,597.21
  5. Step 5: Solve for x
    x = 619,488,597.21/28,499.36
  6. Step 6: Final answer
    x = 21,736.93

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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.