Home / 18,880.05-28,323.49-7,780.57

Finding the Fourth Proportional to 18,880.05, 28,323.49 and 7,780.57

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Solution

The fourth proportional to 18,880.05, 28,323.49 and 7,780.57 is: 11,672.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880.05 : 28,323.49 = 7,780.57 : x
  2. Step 2: Convert to fraction form
    18,880.05/28,323.49 = 7,780.57/x
  3. Step 3: Cross multiply
    18,880.05x = 28,323.49 × 7,780.57
  4. Step 4: Simplify right side
    18,880.05x = 220,372,896.59
  5. Step 5: Solve for x
    x = 220,372,896.59/18,880.05
  6. Step 6: Final answer
    x = 11,672.26

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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.