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Finding the Fourth Proportional to 20,487.63, 28,264.08 and 11,751.63

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Solution

The fourth proportional to 20,487.63, 28,264.08 and 11,751.63 is: 16,212.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.63 : 28,264.08 = 11,751.63 : x
  2. Step 2: Convert to fraction form
    20,487.63/28,264.08 = 11,751.63/x
  3. Step 3: Cross multiply
    20,487.63x = 28,264.08 × 11,751.63
  4. Step 4: Simplify right side
    20,487.63x = 332,149,010.45
  5. Step 5: Solve for x
    x = 332,149,010.45/20,487.63
  6. Step 6: Final answer
    x = 16,212.17

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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.