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Finding the Fourth Proportional to 28,059.84, 38,723.39 and 15,313.84

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Solution

The fourth proportional to 28,059.84, 38,723.39 and 15,313.84 is: 21,133.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.84 : 38,723.39 = 15,313.84 : x
  2. Step 2: Convert to fraction form
    28,059.84/38,723.39 = 15,313.84/x
  3. Step 3: Cross multiply
    28,059.84x = 38,723.39 × 15,313.84
  4. Step 4: Simplify right side
    28,059.84x = 593,003,780.29
  5. Step 5: Solve for x
    x = 593,003,780.29/28,059.84
  6. Step 6: Final answer
    x = 21,133.54

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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.