Home / 18,883.40-28,330.70-7,790.75

Finding the Fourth Proportional to 18,883.40, 28,330.70 and 7,790.75

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Solution

The fourth proportional to 18,883.40, 28,330.70 and 7,790.75 is: 11,688.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,883.40 : 28,330.70 = 7,790.75 : x
  2. Step 2: Convert to fraction form
    18,883.40/28,330.70 = 7,790.75/x
  3. Step 3: Cross multiply
    18,883.40x = 28,330.70 × 7,790.75
  4. Step 4: Simplify right side
    18,883.40x = 220,717,401.03
  5. Step 5: Solve for x
    x = 220,717,401.03/18,883.40
  6. Step 6: Final answer
    x = 11,688.44

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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.