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Finding the Fourth Proportional to 28,515.51, 42,776.03 and 7,455.44

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Solution

The fourth proportional to 28,515.51, 42,776.03 and 7,455.44 is: 11,183.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.51 : 42,776.03 = 7,455.44 : x
  2. Step 2: Convert to fraction form
    28,515.51/42,776.03 = 7,455.44/x
  3. Step 3: Cross multiply
    28,515.51x = 42,776.03 × 7,455.44
  4. Step 4: Simplify right side
    28,515.51x = 318,914,250.68
  5. Step 5: Solve for x
    x = 318,914,250.68/28,515.51
  6. Step 6: Final answer
    x = 11,183.89

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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.