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Finding the Fourth Proportional to 18,750.28, 28,040.76 and 14,309.32

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Solution

The fourth proportional to 18,750.28, 28,040.76 and 14,309.32 is: 21,399.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.28 : 28,040.76 = 14,309.32 : x
  2. Step 2: Convert to fraction form
    18,750.28/28,040.76 = 14,309.32/x
  3. Step 3: Cross multiply
    18,750.28x = 28,040.76 × 14,309.32
  4. Step 4: Simplify right side
    18,750.28x = 401,244,207.88
  5. Step 5: Solve for x
    x = 401,244,207.88/18,750.28
  6. Step 6: Final answer
    x = 21,399.37

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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.