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Finding the Fourth Proportional to 28,700.88, 39,609.86 and 16,768.08

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Solution

The fourth proportional to 28,700.88, 39,609.86 and 16,768.08 is: 23,141.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,700.88 : 39,609.86 = 16,768.08 : x
  2. Step 2: Convert to fraction form
    28,700.88/39,609.86 = 16,768.08/x
  3. Step 3: Cross multiply
    28,700.88x = 39,609.86 × 16,768.08
  4. Step 4: Simplify right side
    28,700.88x = 664,181,301.27
  5. Step 5: Solve for x
    x = 664,181,301.27/28,700.88
  6. Step 6: Final answer
    x = 23,141.50

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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.