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Finding the Fourth Proportional to 18,756.56, 28,126.56 and 6,910.40

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Solution

The fourth proportional to 18,756.56, 28,126.56 and 6,910.40 is: 10,362.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.56 : 28,126.56 = 6,910.40 : x
  2. Step 2: Convert to fraction form
    18,756.56/28,126.56 = 6,910.40/x
  3. Step 3: Cross multiply
    18,756.56x = 28,126.56 × 6,910.40
  4. Step 4: Simplify right side
    18,756.56x = 194,365,780.22
  5. Step 5: Solve for x
    x = 194,365,780.22/18,756.56
  6. Step 6: Final answer
    x = 10,362.55

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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.