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Finding the Fourth Proportional to 28,432.96, 42,654.48 and 13,668.64

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Solution

The fourth proportional to 28,432.96, 42,654.48 and 13,668.64 is: 20,505.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.96 : 42,654.48 = 13,668.64 : x
  2. Step 2: Convert to fraction form
    28,432.96/42,654.48 = 13,668.64/x
  3. Step 3: Cross multiply
    28,432.96x = 42,654.48 × 13,668.64
  4. Step 4: Simplify right side
    28,432.96x = 583,028,731.51
  5. Step 5: Solve for x
    x = 583,028,731.51/28,432.96
  6. Step 6: Final answer
    x = 20,505.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.