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Finding the Fourth Proportional to 18,803.35, 28,205.07 and 7,708.06

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Solution

The fourth proportional to 18,803.35, 28,205.07 and 7,708.06 is: 11,562.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.35 : 28,205.07 = 7,708.06 : x
  2. Step 2: Convert to fraction form
    18,803.35/28,205.07 = 7,708.06/x
  3. Step 3: Cross multiply
    18,803.35x = 28,205.07 × 7,708.06
  4. Step 4: Simplify right side
    18,803.35x = 217,406,371.86
  5. Step 5: Solve for x
    x = 217,406,371.86/18,803.35
  6. Step 6: Final answer
    x = 11,562.11

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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.