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Finding the Fourth Proportional to 28,661.55, 43,010.55 and 16,815.30

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Solution

The fourth proportional to 28,661.55, 43,010.55 and 16,815.30 is: 25,233.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.55 : 43,010.55 = 16,815.30 : x
  2. Step 2: Convert to fraction form
    28,661.55/43,010.55 = 16,815.30/x
  3. Step 3: Cross multiply
    28,661.55x = 43,010.55 × 16,815.30
  4. Step 4: Simplify right side
    28,661.55x = 723,235,301.42
  5. Step 5: Solve for x
    x = 723,235,301.42/28,661.55
  6. Step 6: Final answer
    x = 25,233.64

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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.