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Finding the Fourth Proportional to 28,745.10, 43,117.65 and 7,685.10

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Solution

The fourth proportional to 28,745.10, 43,117.65 and 7,685.10 is: 11,527.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,745.10 : 43,117.65 = 7,685.10 : x
  2. Step 2: Convert to fraction form
    28,745.10/43,117.65 = 7,685.10/x
  3. Step 3: Cross multiply
    28,745.10x = 43,117.65 × 7,685.10
  4. Step 4: Simplify right side
    28,745.10x = 331,363,452.02
  5. Step 5: Solve for x
    x = 331,363,452.02/28,745.10
  6. Step 6: Final answer
    x = 11,527.65

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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.