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Finding the Fourth Proportional to 28,019.92, 38,668.92 and 15,444.64

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Solution

The fourth proportional to 28,019.92, 38,668.92 and 15,444.64 is: 21,314.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.92 : 38,668.92 = 15,444.64 : x
  2. Step 2: Convert to fraction form
    28,019.92/38,668.92 = 15,444.64/x
  3. Step 3: Cross multiply
    28,019.92x = 38,668.92 × 15,444.64
  4. Step 4: Simplify right side
    28,019.92x = 597,227,548.59
  5. Step 5: Solve for x
    x = 597,227,548.59/28,019.92
  6. Step 6: Final answer
    x = 21,314.39

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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.