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Finding the Fourth Proportional to 18,756.63, 28,027.35 and 14,289.48

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Solution

The fourth proportional to 18,756.63, 28,027.35 and 14,289.48 is: 21,352.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.63 : 28,027.35 = 14,289.48 : x
  2. Step 2: Convert to fraction form
    18,756.63/28,027.35 = 14,289.48/x
  3. Step 3: Cross multiply
    18,756.63x = 28,027.35 × 14,289.48
  4. Step 4: Simplify right side
    18,756.63x = 400,496,257.28
  5. Step 5: Solve for x
    x = 400,496,257.28/18,756.63
  6. Step 6: Final answer
    x = 21,352.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.