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Finding the Fourth Proportional to 12,500.63, 18,755.06 and 5,111.31

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Solution

The fourth proportional to 12,500.63, 18,755.06 and 5,111.31 is: 7,668.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,500.63 : 18,755.06 = 5,111.31 : x
  2. Step 2: Convert to fraction form
    12,500.63/18,755.06 = 5,111.31/x
  3. Step 3: Cross multiply
    12,500.63x = 18,755.06 × 5,111.31
  4. Step 4: Simplify right side
    12,500.63x = 95,862,829.84
  5. Step 5: Solve for x
    x = 95,862,829.84/12,500.63
  6. Step 6: Final answer
    x = 7,668.64

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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.