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Finding the Fourth Proportional to 28,900.68, 43,351.11 and 7,840.86

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Solution

The fourth proportional to 28,900.68, 43,351.11 and 7,840.86 is: 11,761.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,900.68 : 43,351.11 = 7,840.86 : x
  2. Step 2: Convert to fraction form
    28,900.68/43,351.11 = 7,840.86/x
  3. Step 3: Cross multiply
    28,900.68x = 43,351.11 × 7,840.86
  4. Step 4: Simplify right side
    28,900.68x = 339,909,984.35
  5. Step 5: Solve for x
    x = 339,909,984.35/28,900.68
  6. Step 6: Final answer
    x = 11,761.31

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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.