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Finding the Fourth Proportional to 18,712.56, 28,051.56 and 7,016.88

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Solution

The fourth proportional to 18,712.56, 28,051.56 and 7,016.88 is: 10,518.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.56 : 28,051.56 = 7,016.88 : x
  2. Step 2: Convert to fraction form
    18,712.56/28,051.56 = 7,016.88/x
  3. Step 3: Cross multiply
    18,712.56x = 28,051.56 × 7,016.88
  4. Step 4: Simplify right side
    18,712.56x = 196,834,430.33
  5. Step 5: Solve for x
    x = 196,834,430.33/18,712.56
  6. Step 6: Final answer
    x = 10,518.84

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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.